Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e970d5ce7b9b1f…

MALICIOUS

PDF

97.8 KB Created: 2021-06-25 23:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 697fcc60143750ea912d1b99ae8d1469 SHA-1: 7707fe7c3f2e4e997f574b696a338d704ac22a91 SHA-256: 60e970d5ce7b9b1f247ac7191c7bedc4a7872cdd1e520481459283c2c1ace657
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a link farm pointing to compromised WordPress upload directories and other domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to host or link to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073aca27f231---82666868748.pdf In PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/aapv6padboteasg65o6rk5cv1l/nejoraxerap.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/63565113909.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/e349ebce7803def7efb0dc95900af89e/51710793893.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/e58b3bf043d04ab1ee2dd08f0f775944/64490078416.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/3138939022ee52e1422d156ffce4dec2/moziwazapije.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/e53775bd8ae16d6e63ebe81f055b863e/40881194984.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/b8a3933d24b8e4eb481d5a5b80f7e749/23321077376.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/41762eb5c7519acee2e5a03120aacf77/kinojaludawavalute.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/pedonuta.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083970c09e72---puvivawegupufunirukug.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/gudaxigikowu.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062410023094.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60B1E6034B8C4.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/tawaw.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/bagara.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422960913a---kojojakemegunutuze.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/suruxu.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094859337c1f---18048689343.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/fsiqnvdpvpd9tu29ireljeibtt/maporulukewotowuzobasej.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd1808d8a5---34820853089.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160729e758974c---wunasekepilisova.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48444f3a2b---bukikabikox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ethical+behavior+in+sportsPDF 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_off00011d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3D 17000 bytes
SHA-256: 405c26a0567101bbb613328f6b7ef3c3ef842c28b1c6cb4d53dc0d04e8d8cc0c
font_01_sfnt_off000149a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000161bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161BB 10660 bytes
SHA-256: 2ed55caaaf6a9d2e71f974141415f703e23c0aea8e8e274183287b390284ca5b

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