Malicious PDF — malware analysis report

Static analysis result for SHA-256 4873c774458dcd7d…

MALICIOUS

PDF

365.2 KB Created: 2022-02-06 23:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-21
MD5: 8192ef79bd4603c74de51442f55fee70 SHA-1: 605285452e30ab54eb51ea6c03236c0b4452f875 SHA-256: 4873c774458dcd7d08f5fa60bdcb56a54388f33bbb95866890e6aab7745d24ca
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5053

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yubit.co.za/XSRYdR1H?utm_term=funny+fitted+sheet+meme PDF link annotation
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/makoduxotipibumukewi.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/17661884171.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/17au3ggqq11u1mbt8m13h461j0/31257041830.pdfIn PDF document text
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/94876580859.pdfIn PDF document text
    • http://avemkz.internet-match.com/upload/files/muvofunebuxipuraxasepose.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/popudinowolomugizil.pdfIn PDF document text
    • https://www.voctestbursa.org/editconsole/kcfinder/upload/files/95848552761.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/miwuz.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/2cc34b9bd157ecfe5a375e937b83ce7b/3118853156.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/68265270510.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202108261343072545.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/161c85727e0adf---30047792201.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/bad765k1uvrlseis2u89hpasm4/nuxajijoxitag.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/jezonaxu.pdfIn PDF document text
    • http://gibisch.com/files/files/dutowup.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de870027d7e---24542688029.pdfIn PDF document text
    • http://safetyservicecenters.com/userfiles/file/30832627379.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/31410363690.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/suzadamuvelob.pdfIn PDF document text
    • http://olympusflights.com/files/files/xogunukoriderafup.pdfIn PDF document text
    • https://www.naturecare.com.au/kcfinder/upload/files/sominesab.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/salafevalub.pdfIn PDF document text
    • https://apluskleaning.com/admin/images/file/96405470090.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/33185413919.pdfPDF link annotation
    • https://betentour.com/sites/default/files/file/46329975144.pdfIn PDF document text
    • https://inncredel.com/uploads/fudadorak.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/kerepipokegakiv.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/remifozutonus.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/60363747825.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/10354732824.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/28b2782e8490719790cf063926738563/wuwomegawozememubumosof.pdfIn PDF document text
    • https://braus.uz/images/shared/file/8471105581.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/63581858595.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/fivozowubax.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1616df4fe0692d---37519368779.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/16092375814.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/8213831567.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off00053d37.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00053d37.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D37 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0005544d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5544D 2548 bytes
SHA-256: 3953058f039c9287361a97c82d38502919839dcffeff148578ab17e7882c2ac6
font_02_sfnt_off00055f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F18 10384 bytes
SHA-256: 6747543e2749f6db77b78d2d58ca200c8fc030d45df52171e62f4d184feae5f7
font_03_sfnt_off00057661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57661 17564 bytes
SHA-256: eda5963e4280d49221d7da87000b7655b9c09676889349688852048401244ad0