Malicious PDF — malware analysis report

Static analysis result for SHA-256 714fb60d7bdaa084…

MALICIOUS

PDF

80.4 KB Created: 2021-09-01 17:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f2243387b2e82e1e57eaee2cbaad0fe6 SHA-1: 937b0ac0855f1b1abc69d547f9cc718ea39093eb SHA-256: 714fb60d7bdaa0840753b1674a8d33e2ac8d8ee2c4ab4b411c5261ad0ee874a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://smidgel.ru/uplcv?utm_term=hey+say+jump+fantastic+time+mp3 PDF link annotation
    • https://fedico.ca/upload/editor/file/30001224845.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a13e62b0b---xowigatinazukif.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/65000126510.pdfIn PDF document text
    • http://drironcat.com/images/file/pekurawusajudajijufu.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/3b20e3846f1706c56066a316887658b1/fojunizivajewawixebix.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086a92e6fbbb---24342653941.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/kanemodava.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/danapesetaxutujobiduj.pdfIn PDF document text
    • http://classtool.info/upload/files/kuvejikabotor.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/fedabubezegaf.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/fagojebijokaregiwasilizu.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/16170533847.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/mekipokifubaxalom.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/99747e5deaa93aac159828746a093639/bubegilinipif.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/5954147158.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///vadesuxu.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/5fjoo94r3eodmleg0mc6e8csrd/vepumijavivova.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16094dd388f1a4---lamozufejatojibaji.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/kenevibosi.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/ogib03iurm4r1q4ps6lnvp5pg3/90907979268.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/96697754261.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/18851449694.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/g550a8vh5mg6f8srp25t7ek1b5/sunuwuvojagad.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///nenol.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b74a6b428---61997980381.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD301 18004 bytes
SHA-256: a58ab8851efdac1ea067c5352ef23056105c5ace9a9cf2a761513e21ace7fd04
font_01_sfnt_off000101b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D0 10880 bytes
SHA-256: 1976b44cd83e682518878fd8240724f259cd8620cdd4c53d69e12887793c0ce3

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