Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0cc185297f88002…

MALICIOUS

PDF

75.3 KB Created: 2021-07-10 10:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13632a33ab12f19be149fb175bac3689 SHA-1: a8cb11ad966bfc360bf3145f95cc6f50f2e2444b SHA-256: c0cc185297f88002a6a2acc5711f9c23a9cc0ce3371d51e7655dd2f6cc1fcbf0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links likely serve to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ef5757179---sabutep.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d0b33bd3a---50744575668.pdf
    • http://74ahs.com/clients/2/2a/2a132ee8da0778863662fd4b1fa251ed/File/22020621888.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd550000f95---gemukatibofaxibudojelumar.pdf
    • https://dubaimotorcycletours.com/uploaded_images/files/53087154851.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609490ca7e6e8---vulisonalanibafig.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1975bf054---91985602649.pdf
    • http://kapli74.ru/upload_picture/25583146318.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f042806a61---tafubopazodudi.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/3akab68p57j95acd300h3100t4/89525538345.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099dfb303251---99189306662.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/50b157690b7aef94a9d6c0b94087f126/31616462801.pdf
    • http://bebelino.ru/userfiles/file/72816582722.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6640d21880e44820238af3e3ce6b1c53/dukigijig.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f21675bb4f5152e1f85d5f0452922fc8/gexumivajet.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/dd2ad8841f345b2011a9b7de762ae3b3/negipetu.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/608add97451564b2b809a90b815c19ab/98035305948.pdf
    • http://westernmaki.com/uploads/files/44708661018.pdf
    • http://misosmile.com/upload/editor/files/13762562393.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608424fc081f0---fisux.pdf
    • http://cosmickino.ru/sadm_files/61790568376.pdf
    • https://bmw-zona.ru/uploads/file/14411563708.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/3d02601de1f152b4a7fa916b0cd932d1/80548496398.pdf
    • http://syarmarka.ru/userfiles/files/29345161893.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=equilibrium+practice+problems+with+answers
    • 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_off0000c4e4.bin
b843d4fc561a9c4dfa57ba7643c4072656aac78dbe850fe8ae6e18098336a8ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E4 16044 bytes
font_01_sfnt_off0000ee6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 16792 bytes
font_02_sfnt_off00010685.bin
19b69ef192cb1a1f7fffdd353ad99df7c0c3ad49335de23c94a9493fad61234e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 11096 bytes