Malicious PDF — malware analysis report

Static analysis result for SHA-256 847a105dfaef5867…

MALICIOUS

PDF

74.7 KB Created: 2021-09-28 14:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: 7ff3ab9efcdfedaadf1912c09cc57d39 SHA-1: 0ab0ca6121889a433fc4819f622ff09f4039e0be SHA-256: 847a105dfaef5867fcb1177b1f2980ed244e2a5177ea751cd077e91c030a92ad
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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 http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149365002e19---37612021529.pdf In PDF document text
    • http://mywayrtk.info/userfiles/file/14722184479.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210916164939113.pdfIn PDF document text
    • http://gibisch.org/files/files/74224406960.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed95866e18---kejifewimurijexutuxu.pdfIn PDF document text
    • http://honghuibio.com/d/files/wawuxakodepadizefepagadi.pdfIn PDF document text
    • https://liguecasa.mmsfoot.com/stock/file/xokuwizobilexawe.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/hrefqrl0v5sdi0e7gnk8ntrqoh/61702802504.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210906234813.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/gotamalop.pdfIn PDF document text
    • https://inijariku.ugdherbal.com/ckfinder/userfiles/files/70100994763.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/dexomenomivevopiba.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/xivanaralemowo.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/32923865368.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/bugupugigur.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136340290494---fudebivowuwisedebu.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/junibubuxivajod.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/gosixozigomad.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/30130643278.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/83406342005.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/46648573963.pdfIn PDF document text
    • https://austarpharma.com/upload/files/ligunoxezoxef.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/bomezulomonepobebavujito.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/45830066840.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/nuditepif.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614d2e323f7b2---mitapivamalena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=phone+cleaner+apk+proPDF link annotation
    • 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_off0000bd0d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000bd0d.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 10204 bytes
SHA-256: 5dfbaadabe08ee6e56cbd51bf0d540a52b619a5e2386c148c5d32f3d5cd3c78f
font_02_sfnt_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 18792 bytes
SHA-256: 8b9b6877841544cda336fad83538dbe4e264adcf14f2a6036bf77a4eb3f250dc