Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf6615af08bd841…

MALICIOUS

PDF

85.2 KB Created: 2021-06-29 23:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ee96832cd54b7a647117f45a837a80d SHA-1: 957e98f3447a97363ad1eea9e42859366136d80f SHA-256: fcf6615af08bd841d9845af67f2cc51d27e35c0634c7fbfc1628b242110d3aed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive use of external links points to a watering hole or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=50+degrees+c+to+f
    • http://gocep.org/data/userfiles/files/xofofufivopinesogo.pdf
    • https://sgotomotiv.org/upload/files/medisomafoxebekolur.pdf
    • http://immopolignano.lu/images/nikejuwerudeniputedo.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c8dee21c4---22214015374.pdf
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160848e2d2095b---dugugiruzujadoz.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980b8e5af0d---91010434795.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ee56559cc---nonifajuj.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/75a7491bf361a1d485108edcb527c311/wodeleretelunibow.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/58269851909.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/m29dp6i4k3jatcrt0so7f54s47/lavujijuruguruzajub.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1ac1d7108937db1c9feabcf2e247065f/fipabazo.pdf
    • http://df-foundry.net/d/files/detelesifanagiges.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da3a44ffa4---63157611160.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/0d936a6c30f013e3868236f9f068793d/69053425232.pdf
    • http://ldbell1965.net/clients/85689/File/wobipagotuvomeju.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/f246c7d98f70147b83e9e52cc23cc37c/98970460347.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160940a52795bb---kujipexubalaxi.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836babbc538---pelamixomibafisivosuta.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/bb0de5c4bd170e537f55060516652bec/vekisoda.pdf
    • https://musikkursus.dk/userfiles/file/nusakikugexirobi.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ae97eeef5---82319239569.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/273b0cddbd29f3e427ebfd43ebc52762/80685880983.pdf
    • https://watertorens.nl/userfiles/file/3731696293.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/iquioii5p2648711raoi5uggs1/tiseru.pdf
    • https://bestofbucerias.com/upload/file/sujitekutozisa.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_off0000ea3b.bin
1ee3429f256652f5f16467884425a3ac673127762f26a85be1004631a26b781b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3B 10404 bytes
font_01_sfnt_off000101b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101B7 16792 bytes
font_02_sfnt_off000119c9.bin
2973317be997d518d7260fde7cd8ddd2454010b36d00060d7c989c75c1207031
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C9 17420 bytes