Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfc0b5f5b7f9bfe…

MALICIOUS

PDF

90.7 KB Created: 2021-07-04 02:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd79479865394177c094070ea2aba116 SHA-1: 05678003ae797b768a5ddb169c2cc39a0beae89b SHA-256: abfc0b5f5b7f9bfefec53b81f2ef4708bc37545c7e14bb26d852a10c4ae27dba
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The document body is heavily obfuscated, but heuristics indicate it is a link farm pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic suggests the document prompts the user to call a phone number, a common tactic in tech-support scams or callback phishing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://ketchas.ru/uplcv?utm_term=rahat+complex+neral
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/5ea858b6f8d2fee430ba518c82e3c9eb/86795552639.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b031d8693fd---30915629810.pdf
    • http://nutronicltd.com/userfiles/file/wulivisusurojomijafewoli.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/908f4459d4cd57b13e4f9dc00058bd1c/zurebekezapugav.pdf
    • https://nevisnews.com/userfiles/41008927221.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/5ap8ol8cg78ec3k3m7bkupv40u/jugifemapafuginipapipafan.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/f8aea4db69ce3843f7365a9f45bb92c7/sajisiralesedeb.pdf
    • http://geometrarontani.it/userfiles/files/mijesojojitazebebap.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/foribezaz.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/gebupinupote.pdf
    • http://aurora-c.jp/files/files/motenali.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/44e4cd0fdfe9f7d7d88eff8d93e57f6a/95478281369.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/53149431870.pdf
    • https://cicadit.ro/UserFiles/file/mesumuwesukim.pdf
    • http://studiovalentini.eu/userfiles/files/92904208588.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160886d5a2a976---87743892928.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d23d774fb---79748979727.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf0fc505a6c---29242945151.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/69f8f2ef622f60725aa19b47f748b9cc/wuduxur.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1307f00e4---36990217280.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca8b31e3db---69650867591.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/hja6g128bj8k2i1bmngnbrcvrj/zisumajes.pdf
    • http://nena-artspace.com/ckfinder/userfiles/files/20170233664.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/7c5d923f27eec08b7ae39d76984d60c8/19047913111.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ieotps27iusjh60jds1m8vais4/mekavipinigilexepanuxog.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_off0000ff4a.bin
6decd73d6d93181beed3aefe386502cdcfd2085f08925e54699ee32f29af215e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 17564 bytes
font_01_sfnt_off00012d98.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D98 16792 bytes
font_02_sfnt_off000145af.bin
766de31e9a157d1f1735432c0ff48d6cdadadf4ef38cd03338ea4dd44f32ebdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145AF 10524 bytes

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