Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12967662c84a483…

MALICIOUS

PDF

82.2 KB Created: 2021-09-11 20:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0332892d58442cc217a3c12b99cf8731 SHA-1: 34e007206c86056ba0f870e53067efcd8fd50ba9 SHA-256: c12967662c84a48360b788fc978a90b57105a71622bfa412c354e7344a6da0ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to files hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344ef44e6a5---jugapexilejo.pdf In PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/wonita.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/mowelusufifexiluvuradepi.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/xewasikasa.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/benawakedezesuro.pdfIn PDF document text
    • https://promise-land.com/upload/file/82077129745.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/mezedaparuxevu.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/46f23ffffb673eb970781dd908d4e741/33015687888.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/30665352485.pdfIn PDF document text
    • https://dafelia.com/files/75376661247.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139e4020db38---90072788189.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/85447985944.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/rj4kqf9ce0q0cb3sljn1bebh36/rakivegavufuzijetotowot.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/tabepagavowomenadoti.pdfIn PDF document text
    • http://hacsbathtarntaran.org/~/userfiles/file/64156366944.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/9939771908.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/neneto.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/31052297824.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/fuwitowofupexepijifage.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/wirumudonofibifugo.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/kinuvirexavejerezomigu.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/topenedok.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/uvqnqnrdrtpusp0d0bkqk8e1ue/85432302188.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/94841583173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=what+is+payment+gateway+in+androidPDF 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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 10988 bytes
SHA-256: 7a79d1a6cd98b777670e9d61a106129b85a613ff6d9dbb6eb1c52e6a263078e2
font_01_sfnt_off0000f510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF510 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D22 17396 bytes
SHA-256: 5cadf799b621f9a7797df2ab1db3f482f9aa6688f9547e2be75847ab55800c54

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