Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f867a84ef54b19e…

MALICIOUS

PDF

70.9 KB Created: 2021-03-13 19:31:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: f85ee8946164091a48d4f452b2f7076b SHA-1: 9e0b8a42d8f34eb51524e951ae47ac7dd691f806 SHA-256: 7f867a84ef54b19e5d0ff5bdcbaba5691e8fe68e3a61eda14cff93d04f01f24c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. While no scripts were extracted, the overall structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jottigo.ru/award?keyword=bible+pdf+download PDF link annotation
    • http://moneymaya.site/rutotivapudnrs8l.pdfIn PDF document text
    • https://cdn.sqhk.co/dafagupovo/bNf6NXN/negefex.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/bG8KjLn/black_cod_recipes_grilled.pdfIn PDF document text
    • https://cdn.sqhk.co/novimabe/bDMvheG/jinodubila.pdfIn PDF document text
    • http://tlgfree.xyz/89024372748x9rqx.pdfIn PDF document text
    • http://ipai.online/how_to_do_illinois_taxes4hl7n.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/un_curso_de_milagros_leccion_31m6u9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_60182c0eaaf75.pdfIn PDF document text
    • https://cdn.sqhk.co/vapitinab/jDjjTFP/tangled_soundtrack_playlist.pdfIn PDF document text
    • http://marketeuro.pro/dowetoh3gy7.pdfIn PDF document text
    • http://white-x.fun/how_to_clean_a_cuisinart_coffee_on_demand_makerawx1w.pdfIn PDF document text
    • http://edapog.online/nikon_f5_review_youtubebb6mr.pdfIn PDF document text
    • http://damita.fun/guide_to_ditching_cabler4vfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486221/normal_5fd67cdc32509.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478131/normal_5ff13de11789a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_23b614fd90ab4a6db4be67236f468307.pdf?index=trueIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_acfa41ddd09c4160ae87dfae36060433.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_10abd59fb9994ef78c13ee5226c06d26.pdf?index=trueIn PDF document text
    • https://0108a07e-94d6-443d-bfa7-575dd38852ad.filesusr.com/ugd/756a01_5a6584b2146844f9b678080820646a0b.pdf?index=trueIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_5443bee8303e4f1a943c7d7667e68492.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91C 5040 bytes
SHA-256: 6633f5dc73ed09eb20eb7f386ef009680bf6b67aa7913c248af9658b872248b8
font_01_sfnt_off0000ea6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 10696 bytes
SHA-256: 3b5eb2e0ffb35fb708093dccfebfc31225d8998a471758d088ee03d308e8b56c

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