Malicious PDF — malware analysis report

Static analysis result for SHA-256 42eb853b99b944a2…

MALICIOUS

PDF

72.3 KB Created: 2021-02-26 11:50:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 33522d03fecbf61f376c6f0ba2f9bae4 SHA-1: 7ef15e1d6d12179106c650eee2d943df001e3508 SHA-256: 42eb853b99b944a20573f04ad7a399016807d75c3919d71eed5c2a9f2b04e7cc
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable hosting and acting as a link farm, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior, suggesting the document's primary purpose is to redirect users to potentially harmful sites.

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://mezovuduw.ru/strik?utm_term=canon+lide+220+scanner+price+in+sri+lanka PDF link annotation
    • https://cdn.sqhk.co/dusujukakal/C1ljhpx/war_of_warships_legends_gameplay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444374/normal_5ff1dc58ac4a0.pdfIn PDF document text
    • https://sasominafa.weebly.com/uploads/1/3/4/3/134362810/368ea899ac.pdfIn PDF document text
    • http://mantenancie.com/dafuxetaxijurutusuxumbnjg2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444098/normal_6035cc3c9a4e7.pdfIn PDF document text
    • https://kikitepolo.weebly.com/uploads/1/3/4/5/134514310/3f0442.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/jijubitideledozojuiulqe.pdfIn PDF document text
    • http://tehnikator.ru/alcohol_phenol_and_ether_target_class_12yiekc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484814/normal_6025cf87b76e9.pdfIn PDF document text
    • https://cdn.sqhk.co/lipebefaje/tjgjjia/galaxy_attack_alien_shooter_hack_mod.pdfIn PDF document text
    • http://job-finder.space/envision_florida_algebra_1_answer_keydxpaj.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/648a27e.pdfIn PDF document text
    • https://toxosujaduwo.weebly.com/uploads/1/3/0/8/130874389/abe2523a5391b71.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/5244612.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/Egg7jb1/banana_cake_recipes_with_buttermilk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/taturi/anaesthetic_drugs_pharmacology.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/araki_character_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE22 5136 bytes
SHA-256: 4093cdfcc19618e6429a0b5957811e0e8ce985a85c6736e5dd0046a7584f2efc
font_01_sfnt_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 11284 bytes
SHA-256: 3da00a88af82b4082117ece3b330e9da371afa5c72bfb7106de6ed69765460bb
font_02_sfnt_off00010636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10636 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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