Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee7704b9c776cb4…

MALICIOUS

PDF

81.7 KB Created: 2021-08-23 09:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3d99829d51efa9671f26f6b972c8ee71 SHA-1: 61ccd0446e88d5ac0d02c665c3151ce0b4b0d532 SHA-256: 4ee7704b9c776cb4033433b51cd558fe9910480ae40d00366401616454c73b50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV both flagged this PDF as malicious, with ClamAV identifying it as a phishing trojan. Heuristics indicate the PDF contains a link farm pointing to multiple distinct hosts, many of which are associated with compromised WordPress installations. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/161219267bccc7---37047412378.pdf In PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/86492bd8f3666569fc4d7d98eb031561/58649556370.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5bd5f74aa4---26620326222.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ar8b13v7dp8a01golj9ae2ebjs/93837914249.pdfIn PDF document text
    • https://jensbrode.de/files/file/88705303466.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/sonetapiwetusif.pdfIn PDF document text
    • https://nasroglobal.com/userfiles/file/litifakipos.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210605163359_414019784.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/98763234653.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/t3089kfg4ukc26v5uetv525fna/vajugozavaxiselawo.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0bb42823a408db86183555f789f8132b/safipuzuxurixobexopopa.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/13518467089.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/jekomijenijobiwalitujida.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/24098115608.pdfIn PDF document text
    • http://recrute.fr/files/files/rirukilesobopuk.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/nugixiwizepo.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/9864213146.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f2396113be1---boxumog.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/15d7aab5bcd14b0fb082cf2b316b6132/54882640503.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/pagosarorulunur.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/31280497845.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=saving+powerpoint+as+pdf+with+notesPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB8 16808 bytes
SHA-256: 548f9bc798e597bc09da7bcf6213d255aabde6e1231eef219f8ed64b08a1dee2
font_01_sfnt_off00010733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10733 10960 bytes
SHA-256: 0a35ab277229cebb2a370ed747c2421e5efdefcb3f0ec778742b1ed348781fae
font_02_sfnt_off0001206b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.