Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bb2f5833bc1abc…

MALICIOUS

PDF

83.3 KB Created: 2021-09-19 03:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07c3456ed9e349b08b59ff5422114e22 SHA-1: 95ad7f59f4818890816a7a6b38d1306aa5e229c0 SHA-256: 46bb2f5833bc1abc026060b4d7af5783dc190e105d411ea10a82ec480f2e7944
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=downton+abbey+series+download
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9dd83f8b1b1838faa8ef19e36bc37b24/kizodufafagotipugeg.pdf
    • http://adirondackseafood.com/ckfinder/userfiles/files/63318128963.pdf
    • http://tuttotop.com/userfiles/files/gufixagitexega.pdf
    • http://codienlanhtrangia.com/Images_upload/files/xonuxexogufovim.pdf
    • http://aallergy.friend-match.com/upload/files/81540028385.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/1cb61f7388a906b6841d4a89c2047372/nemabibeluw.pdf
    • https://mimpishio2.com/contents/files/dumoruvukemilupixiz.pdf
    • http://manisafar.com/basefile/marcosafarir/files/1631127699.pdf
    • http://www.ondebiz.com/userfiles/file/ripabumonamusupumevil.pdf
    • http://pmrs.ps/userfiles/file/jeneluvofej.pdf
    • https://rpdev.org/ckfinder/userfiles/files/46711091387.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc0e101ea3---63078153584.pdf
    • https://kltccompany.com/ckfinder/userfiles/files/61250076536.pdf
    • https://namphuctourist.com/userfiles/file/xuwojafimudomudajigebas.pdf
    • https://lexcyberia.com/userfiles/files/pomaxijokomigilejotot.pdf
    • http://zensushialiso.com/uploads/files/73330337490.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614383f19f0c8---3319774454.pdf
    • http://chothuexeninhbinh.net/data/dulieu/files/mazel.pdf
    • http://szjwwj.com/userfiles/file///21629662992.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16136e4249abba---68130881666.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335c93c623f---pixabotaderedunaruvofeji.pdf
    • https://ajambary.com/userfiles/file/75211033230.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de08.bin
0418cdb86ffac786a6614216bd261fe67f00a6523ae7145283dad0ee1b3c7111
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE08 18732 bytes
font_01_sfnt_off00010ee8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 16792 bytes
font_02_sfnt_off000126ff.bin
b98c112c53225896072c5a7f842a6d0bf1e3ad0be51717ebbce63009a7be7d91
pdf-font-stream PDF embedded font (sfnt) at offset 0x126FF 10584 bytes