Malicious PDF — malware analysis report

Static analysis result for SHA-256 89027ef5067c7968…

MALICIOUS

PDF

84.1 KB Created: 2021-03-03 09:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 615264791453a70e5cbdc445e938ef85 SHA-1: b184ca35a0f83cbc9a9e0449aaee7b1a0fdf1a59 SHA-256: 89027ef5067c796856db698049b7c6bc5a81988dcf1aaf7a4e107a7b398459c9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs, one of which, 'https://seumenha.ru/123?utm_term=what+should+be+my+calorie+intake+to+gain+weight', is identified as a potential phishing lure. The document body, though heavily obfuscated, appears to be related to search queries, suggesting a phishing attempt disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://seumenha.ru/123?utm_term=what+should+be+my+calorie+intake+to+gain+weight PDF link annotation
    • https://cdn.sqhk.co/gorokipo/gPidDjj/pizovoxamufimepukorox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_6019a767e1a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_60225f874c54a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_603b9d620cf21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366389/normal_60018ba14692e.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/eU5pjey/samurai_sword_makers_marks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485301/normal_601d8b3f8172d.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/682Co4J/62448062839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fe2d29e6b1cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/gezuvenupelumuz.pdfIn PDF document text
    • http://baxadozivu.epizy.com/loxibuxin.pdfIn PDF document text
    • http://rikewopuze.epizy.com/imusa_pressure_cooker_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/borbaad_bengali_movie_hd_1080p.pdfIn PDF document text
    • http://mawekipabotore.epizy.com/2_examples_of_guided_and_unguided_media.pdfIn PDF document text
    • http://duvipegi.epizy.com/exampro_electricity_test_answers.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EB 5764 bytes
SHA-256: c3e5588cb5baf4e307dcd0419c4ef7e5027f34bb44205261b5dae65d8a5d9d01
font_01_sfnt_off00011d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D79 11068 bytes
SHA-256: bf6ecfa09b6f653380f9aed8656ba58bac2eca8b07ea270cb11fe522767ba48a

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