Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d35ab7b76582f6…

MALICIOUS

PDF

81.8 KB Created: 2021-03-23 09:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1825d4c42416befe6141def766b8033c SHA-1: 270f341bff14b25bc9c1d7acb83285f8dfc7c4fe SHA-256: 48d35ab7b76582f608b6710ac04b249d805208a62244244e2906514e3bd6e23f
156 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to websites designed to host further malicious content or phishing pages. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=unlock+games+space+cowboys
    • https://dijuwinepogiw.weebly.com/uploads/1/3/0/7/130738679/2432178.pdf
    • https://cdn.sqhk.co/wogokodu/a8Mijhd/kaiser_permanente_washington.pdf
    • https://cdn-cms.f-static.net/uploads/4450424/normal_6054243cd1d10.pdf
    • https://cdn.sqhk.co/juvebuzizej/hb7xMZL/zogizeze.pdf
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/kupilugibagi_dopagisusapite_mowazogemam_fuvage.pdf
    • https://zasubimivari.weebly.com/uploads/1/3/1/3/131383839/sanulenaledavati.pdf
    • https://cdn.sqhk.co/tirabipati/XhhE7GP/bradshaw_hall_primary_school_ofsted_report.pdf
    • http://letaraluzim.scienceontheweb.net/kulajonojega.pdf
    • https://cdn.sqhk.co/bipokagiti/pnQhhgd/generals_online_game.pdf
    • https://cdn-cms.f-static.net/uploads/4449411/normal_602698d9a947e.pdf
    • https://cdn.sqhk.co/sajatanugeg/j6jdhiP/temple_run_2_online_poki.pdf
    • https://cdn.sqhk.co/xinulezebi/bgeKhjE/smoke_editor_steam_effects_photo_studio_near_me.pdf
    • https://cdn.sqhk.co/doxowite/6JABjd1/production_sound_mixer_assistant_job_description.pdf
    • https://cdn.sqhk.co/givifevulo/jjhjUtu/lesson_plan_templates_for_online_learning.pdf
    • http://jakufodunod.getenjoyment.net/coleman_powermate_3750_generator_carburetor.pdf
    • http://sagedix.medianewsonline.com/25020773168.pdf
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/kebinuna.pdf
    • https://cdn.sqhk.co/momajuxu/bjgjcV0/48484604144.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pesetufavo/aluminum_sheet_metal_canada.pdf
    • https://s3.amazonaws.com/vovuzize/tenugipupixulodovotej.pdf
    • http://wolobugoxew.myartsonline.com/jikajutakapas.pdf
    • http://fajenadiwizowo.atwebpages.com/java_ee_spring_spring_mvc_mybatis.pdf
    • https://s3.amazonaws.com/nagudo/13742456923.pdf
    • https://s3.amazonaws.com/gezetega/nobajezito.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1d.bin
09472de6f26b1a41d76404465febca866300baa7a87f308d451b0b78dd9567d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 5452 bytes
font_01_sfnt_off00010220.bin
c9a1e4910331636252abf81a8e4d381d87c7281fdb8fc1d20834c521367dbd53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 5544 bytes
font_02_sfnt_off00011513.bin
9ed3513a822516c6eef3067fe371a52c11c272299e1f9745b1b96bfd435be8c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11513 10636 bytes

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