Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c0b22b33f00c65…

MALICIOUS

PDF

95.5 KB Created: 2021-07-15 21:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 129c8e06b00726cbad4d9a68a6ce98fb SHA-1: 6fba8aab7014ef3e72700f553226a84c9331f752 SHA-256: c2c0b22b33f00c65ee7902ecd1f8928c79a1461ff34f5cb6418a1709ec027ffe
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Web Session Cookie T1056.001 Input Capture: Keylogging

The PDF document exhibits characteristics of a phishing lure, specifically designed to harvest credentials or session tokens through a fake MFA or one-time code confirmation page. The presence of numerous external URIs pointing to compromised CMS uploads and disposable hosting, combined with the ML classifier and ClamAV detection, strongly indicates malicious intent. The document body was unreadable, but the heuristics clearly point to a credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://pistant.ru/uplcv?utm_term=how+to+clear+trash+from+android+phone
    • http://pathtojanna.com/userfiles/files/86897032144.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/r5br64pgualcpg0e4181acbdik/luwiwinabuwoxoluwim.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/7a2b5b154c1445fbd84599b3f1e7ca36/xitetam.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073701bd8170---57916425041.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/11cb3fdcbac52012f6054cdd10214698/8418092225.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/4d06nbacg6jpm2cfieucvvupd3/zolure.pdf
    • http://fdscience.com/UPFILE/userfiles/files/4144382289.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/94nnnlcrcas9sgqjl1su45de0b/rasosebajunifapifevom.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160990f7b7111d---51461044530.pdf
    • https://cepatdaftargroup2.com/contents//files/614184258.pdf
    • http://agcslohian.com/userfiles/file/91061875833.pdf
    • http://adaviestransportltd.com/userfiles/file/soxerifaw.pdf
    • http://tantex.org/tantex/tantexuserfiles/file/35589292552.pdf
    • http://poorclarescork.ie/images/69621845548.pdf
    • http://thehigh86.com/clients/13680/File/fitoxinurivovopokonif.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/5e1d12debdc3ecc6bd068531f58de7d6/lalujapaxug.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e280466176f---93968584339.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/aaca70cd931464f7f20f9494c6beaaab/75285373347.pdf
    • http://sun-eko.eu/files/file/95302426893.pdf
    • http://originalcheck.it/public/img_admin/file///21513677232.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753f2bb7ab1---fagenegazituneme.pdf
    • https://burstallconrad.com/editor_files/file/69531939573.pdf
    • https://hohsingfiber.com/ufiles/files/sijofibubonizonesowesanif.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f61d9a261---98729286410.pdf
    • http://vdadanang.vn/app/webroot/assets/files/vafujowuxadoxaxed.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/2fb7ec7f08d250a80c93c7e58b203b0c/37918160938.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2088df6e9---44208610280.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_off0001125b.bin
16e001955ae6fb78b378800ffa67c8661f5336ca23b82a3756e24edd94892e04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 10960 bytes
font_01_sfnt_off00012b99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B99 16792 bytes
font_02_sfnt_off000143ab.bin
7ed03e7a64f4d309ba99de8a3e018a65fc6b89d6e49b3166c966a69850f4317d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143AB 17444 bytes

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