Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b8956908fda311…

MALICIOUS

PDF

72.4 KB Created: 2021-04-11 17:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 211e2f6a318eb9f0dc5650bc9d6b7bab SHA-1: 8eb6e3978dcbb071f3c0978b6e4865327003fe21 SHA-256: 01b8956908fda311dd94bac87e3d4a129bcb2ad7e40e108826eb1dd23bc470d5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=international+financial+management+mcqs+pdf PDF link annotation
    • https://cdn.sqhk.co/dipasupor/XhdxhiD/xawub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423195/normal_5fcf840a8171c.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/jicCN7p/bluffton_sc_weather_radar.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/is_cyberpunk_2077_good_on_xbox_one1kjl5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_606b24e3c2e53.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxudopusot/hfijsid/balloon_font_free_for_mac.pdfIn PDF document text
    • http://sberin.xyz/bonulilozoxozajovinacsqz1.pdfIn PDF document text
    • http://info-pages.ru/street_legal_racing_car_listr9udz.pdfIn PDF document text
    • http://sfr-webmail.com/winwrap_basic_tutorialltkxk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_6017501b1ee6c.pdfIn PDF document text
    • https://cdn.sqhk.co/jabezoxujo/JgdSihG/suxuwatapovov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5ffb2f367bc14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_5fd796908d23f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376098/normal_5fec453179354.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/iCjcIif/abc_123_song_jackson_5_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409248/normal_6025eb566c9b7.pdfIn PDF document text
    • https://cdn.sqhk.co/fivuwunar/Q2jbgL9/stone_island_t_shirt_size_guide.pdfIn PDF document text
    • http://lunesygets.xyz/48436691555ayjef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416675/normal_602205cc0a8e1.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/buwosevax/wopalute.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/detozimaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/kirifawukutarelozoxub.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/60934425353.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/65412934228.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 5536 bytes
SHA-256: bb428dc1725bc0d9ec53ae7bb51b4c6e4ff0998b9502e2d0f053ed3e544b761d
font_01_sfnt_off0000ef55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 10676 bytes
SHA-256: dabcd4b16416695ef700c10ddaa0a065b3aa1c45f78e35d2d5638bd69c8f8911

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