Malicious PDF — malware analysis report

Static analysis result for SHA-256 7204aaff03bb6724…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 04:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9825e18f9e2538fbc48d40a3493f0602 SHA-1: 6c76b9712ec5b6431ece0c1336d6fda50c7d4335 SHA-256: 7204aaff03bb6724662ada880ef4837d94e22d1d18c740208130658c0c311914
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing operations. Although no scripts were directly extracted, the structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://coretry.ru/uplcv?utm_term=canon+eos+6d+manual+pdf+download PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0s550duj6bpig58735jnevjui7/fegof.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/pukudize.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/33574028201.pdfIn PDF document text
    • http://614move.com/clients/4890/File/32913535177.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/54953188474.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611de6b37f411---18686838167.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/35215086702.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/xukifuko.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c924ba9ba3e---vifuzerufamurujowopapataj.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/gidazuluwepikobax.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/10455466570.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/3661c39f21793db4972e282fc8ca2156/68359520516.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/jolizol.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac65e239914---dekakoladam.pdfIn PDF document text
    • https://rotherelectric.com/files/vonudijanemawavas.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210606020444.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/68860399048.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16075b9fe8f6b0---26841418520.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078043f6e680---nonemagodir.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/48578335909.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2874d0776f---1130472180.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849f4a1dccf---biruleminixelus.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/juxafetobugivuxuwineni.pdfIn PDF document text
    • 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_off0000d7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DA 10756 bytes
SHA-256: 707e72fac958017004998f2bb660806fbc5964699cf738025e768c558db55bce
font_01_sfnt_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 17244 bytes
SHA-256: ccda1b82591f8477425f5b7f6d9c5d76edd046858c63bd37a8a53e5f64c4e184
font_02_sfnt_off00011d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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