Malicious PDF — malware analysis report

Static analysis result for SHA-256 a242d9bdf20f18bf…

MALICIOUS

PDF

84.7 KB Created: 2021-07-02 16:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 88806e0d3130ae3e3108911e875474a6 SHA-1: dd223a45960d8e1ae99bd72c33737eecbee1a5ff SHA-256: a242d9bdf20f18bfd419cb03179f58251b14dde0a7a58f919d2e78f56bec0181
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous links to compromised websites, suggesting it's part of a link farm or phishing campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt the user to call a phone number, a common tactic in tech-support scams or refund-related phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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) or Microsoft license-boilerplate 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://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/eopfbpekue3nd3qidf1npgeq46/1400028379.pdf In PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb9e96301f---bosubufoxoxujotobalepe.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160810486ba7e2---xakedu.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/39326617502.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/69021528733.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/k7phs1cg6501cfgcemfbn3mr5g/ximewabu.pdfIn PDF document text
    • https://ahha.az/userfiles/file/75873636863.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdadae43e2---zujijir.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/50281750932.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1db22d3c9e---76809509059.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/ddf8b7255587ab16b36304f3ed8db0b5/zilab.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/wolozofiwumom.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160baba7205fba---63549159776.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/8ae5b5f64e1deaac27c5480c33b0a37b/xikirujubomowerub.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/70108283092.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/d0e426a710020de98abad6d512d765a2/98762574921.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/587ac4842893acee3d2e99e4215ce7fe/24560249179.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/6f006785c1fff7719f0795f509dbf4ce/tawin.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6d3014782---wefodawapetekukoleso.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/pejatujuwivigetux.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/5484951563.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/55426803584.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160af9bf8697c0---muzogovujogi.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/0b2bc2c7a1ee6820594b524558a0aa03/ramujuguvinerasalamifov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=uhs+email+from+homePDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 17064 bytes
SHA-256: 0d606fef245c908079a74fdf6cdc46332183817959d48ea4178cb31967e30ee7
font_01_sfnt_off00011693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11693 10284 bytes
SHA-256: b13dcde0fea137a66c1af8da8588f535ec77715e458ecbf0d83f6c6b982865c8
font_02_sfnt_off00012da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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