Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab02e97e6852107…

MALICIOUS

PDF

69.8 KB Created: 2021-09-28 10:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 7a91a0565531d04b43c0701bee3a1d7c SHA-1: 167ba6f07a6a488cb69be5ed16054dcffa01651d SHA-256: cab02e97e685210757a8398d0b28221f1439b49de6e7638d466059f8a7d17a28
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://queure.ru/uplcv?utm_term=why+is+my+android+phone+running+so+slow PDF link annotation
    • http://egitara.com/upfiles/files/33402946248.pdfIn PDF document text
    • http://saydersan.com/firma/files/25847785742.pdfIn PDF document text
    • http://thegioioto.store/upload/files/9242595711.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/31316704835.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/wegizususidifiwas.pdfIn PDF document text
    • http://htwy.com/upload/file/batutilupowi.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/98554063544.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16140d8eb22fd3---14567506503.pdfIn PDF document text
    • http://temdientu.vn/images/ckeditor/files/24164895020.pdfIn PDF document text
    • http://krallarintavugu.com/upload/file/12656976871.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/powesetexilejoxoboketeji.pdfIn PDF document text
    • http://badgerhillfarm.uk/posub.pdfIn PDF document text
    • http://parateam.cz/file/mogis.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/53512096280.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/kofokawenasepoxan.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/legenumizivavumuli.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/10144400039.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16134f09123b3c---bojibefixirixazalumulova.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109051653286952.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/rikag.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/94479021885.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d97ecbbc5f---32555562279.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/97d541f107ae7b6211df381701102284/95657237488.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/68cbb47b907d12958efb12a445a7552e/25374167852.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/95237629971.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_off0000b3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D3 11032 bytes
SHA-256: 8539fed7e5cb5149b07e0eb1d1bdc4f4bfcf91bcb352305a7a785efaf17475f2
font_01_sfnt_off0000cd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE526 14332 bytes
SHA-256: f79220e2a4238e793bea501e95644710a705306f0199d6914e83900c588f7b2a