Malicious PDF — malware analysis report

Static analysis result for SHA-256 0211802c6320a252…

MALICIOUS

PDF

75.8 KB Created: 2021-05-11 19:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 894de144d00c0b2eeaf30d6dfb4a8b6b SHA-1: 283ced3332da873d2770fe6171a812435aaf1e43 SHA-256: 0211802c6320a25214b50b07e8a95b5066c8b9e11fd5bbbc03a2355a2a495d75
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 part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to car sales, likely designed to trick users into clicking malicious links.

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://jumiwimov.ru/strik?utm_term=2018+ford+mustang+ecoboost+premium+for+sale+near+me PDF link annotation
    • http://gubinuwub.iblogger.org/kivug.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/avtS8if/face_changer_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/hcYhfjd/64151218636.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/how_do_you_fix_a_dvd_player_that_freezes_and_skips.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukumivu/IgiZJie/knuckle_duster_template.pdfIn PDF document text
    • http://gimerixifaxet.iblogger.org/amman_songs_veeramanidasan.pdfIn PDF document text
    • https://cdn.sqhk.co/rivojotewez/hCnigvX/gapeliwavatiditoludebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476593/normal_603f79ac1ad7a.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/jfififm/craftsman_stair_newel_post.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_601cf199b01bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_6044049861592.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497395/normal_60086b8f485a9.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/hdSgj2F/costume_store_downtown_atlanta.pdfIn PDF document text
    • https://cdn.sqhk.co/xonafelog/iiNXuRq/73718223761.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/7pG9hgl/51473400505.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/nolarifaforuxop/vba_set_active_worksheet_name.pdfIn PDF document text
    • http://kagexukus.rf.gd/police_tv_oxford_bookworms_starter.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/sudedupi.pdfIn PDF document text
    • http://wopojofa.atwebpages.com/sogifivepobubixokil.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_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 6040 bytes
SHA-256: 42cfad085b739c32609b47599e887798dcb906115a849d8437791cacae5a6d5a
font_01_sfnt_off0000fae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 11464 bytes
SHA-256: ea4c16c666562181ee0f26a2f67f20dc813e82351eb556e58affa0869d20eee9

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