Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb034bbe296689f7…

MALICIOUS

PDF

75.6 KB Created: 2021-03-05 07:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 88e525245d044a8abf928548e646475c SHA-1: 77b7bceefd9239d4155afc2ca5124f94cb419e63 SHA-256: bb034bbe296689f79c21ff3b0fd38b8b9af573eef32d5699818b3614ca0e0c6a
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 hosting and are likely part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=meaning+of+good+communication+skills PDF link annotation
    • http://ketrovk.xyz/is_kundli_matching_necessary_for_love_marriagejmli7.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/msi_990fxa_gaming_cmos_reset.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/woweb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475987/normal_60064a056da4e.pdfIn PDF document text
    • https://cdn.sqhk.co/ragebobeb/hijYicH/chicken_gun_game_for_pc.pdfIn PDF document text
    • http://excschool.ru/7487668419q7tcx.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/hcjhz1q/mobazufedusarunizezivi.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hg0usji/snapping_turtle_eggs_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/djbgfDr/bloons_tower_defense_6_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5ffae7b79ead2.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/hp_deskjet_2132_manual1a6kv.pdfIn PDF document text
    • http://kemytbok.xyz/patararowupqn2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482869/normal_602803ab92ea6.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/iQSZ6XG/zikizedevalamexeluwipazo.pdfIn PDF document text
    • http://uber-global.com/33621037694gzy7y.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/vuraradaso/hack_free_fire_aimbot.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/70354291198.pdfIn PDF document text
    • http://kokibitumoxa.epizy.com/palozogabejewexuwuvuxabe.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/how_to_crack_minecraft_windows_10_edition.pdfIn PDF document text
    • http://gopinos.epizy.com/22069195049.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_off0000ebbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 5312 bytes
SHA-256: cb29a20d707fecf91605488feebb0be64bea86296db5f54d03ed6dd3088bed55
font_01_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 10168 bytes
SHA-256: 736af7dbe647d3a1b913a884bc44bead1d990a14341822d3852708b41a7e68ce

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