Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ad4d41eae7843d…

MALICIOUS

PDF

78.6 KB Created: 2021-06-25 15:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 525226b2dd1a52dacc3631dae73ee183 SHA-1: 7025e85f8935f34f1b759d06abea19ff8bf37823 SHA-256: 94ad4d41eae7843d9d55459aeee0815250d82a2d9b27ade62e82e79a7c07e862
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document likely contains a phone number intended to trick the user into calling for a fake issue, a common tactic in callback phishing and tech-support scams. While no scripts were extracted, the presence of numerous links to potentially compromised WordPress sites and disposable hosting suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://goraku-sangyo.com/userfiles/file/fobibofivudex.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/duamgcsoc2o0vcv7dm4ucvsjhb/raguxelibifidiletadoj.pdf
    • http://kulturazebrak.cz/userfiles/xuzipefepemipinurete.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba4b201b66---30841481621.pdf
    • http://yilip.net/userData/board/file/36073228824.pdf
    • http://danielbushreunion.com/clients/41596/File/pafiseteruxalukabuxon.pdf
    • http://manavpublicschool.org/manav/userfiles/file/80595439623.pdf
    • http://villabrown.it/userfiles/files/91760520578.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/7085e888a013d58165ccfc810413706c/96402687091.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/356be339a7124102cbb1a157fcde5412/fefaruvazobeporiledukud.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fe1e4d330---tepekodiguvelom.pdf
    • http://polyalpan.hu/_user/file/ratewugenopanezejimokavu.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/95fc1bc0066294e73b350bd5f12388db/jibevagazoxe.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/74567c66d597b1a436e5c9ecd6c233fe/15929612366.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d321f56177---41583738328.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/m7jfg1thapmlnq6lafnr1n76s5/lutaluxukilaxawe.pdf
    • https://fanaf.comarticle_ressources/file/kegasog.pdf
    • http://alexandrapanayotou.com/web/images/static/file/56248870392.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=sanpete+county+booking+report
    • 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_off0000cde7.bin
eb5da1edda4e196a02a7763fd37ac6c0851bd8a38f3a781a30661a9a3f0bc076
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE7 17192 bytes
font_01_sfnt_off0000fab1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB1 16792 bytes
font_02_sfnt_off000112c8.bin
1a391ca7f6f6a0c3bddb94728523aeb7e14052aa9b56fe59b0aed7a309d28a0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x112C8 10856 bytes