Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e7b227085bdae0…

MALICIOUS

PDF

82.1 KB Created: 2021-03-04 12:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 371e9da54e2ad375f6c1bd5054614ea7 SHA-1: 2feeb4138927915493b4062e5c7277d0aa02eae5 SHA-256: 72e7b227085bdae0661f68a78c66cf1cf994a8e7e87c683d5ff58f3b2d78b74b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting an attempt to direct users to various websites. One prominent URL, 'https://jottigo.ru/strik?utm_term=the+wages+of+whiteness+david+roediger', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jottigo.ru/strik?utm_term=the+wages+of+whiteness+david+roediger PDF link annotation
    • https://cdn.sqhk.co/gatuwaven/hivigjc/samsung_level_box_manual.pdfIn PDF document text
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/lovorajevi-xesogibuwininu-piwif.pdfIn PDF document text
    • https://zevofukuje.weebly.com/uploads/1/3/4/5/134585027/8751a3e0edf.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/jejdlha/xipavipawitepubefepeginut.pdfIn PDF document text
    • https://lepudumewo.weebly.com/uploads/1/3/5/9/135962044/6698629.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/6gjihjf/video_bingo_mentone.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/iaBhjgg/jezutagano.pdfIn PDF document text
    • https://cdn.sqhk.co/burajugi/a1xkKn0/democracy_definition_ancient_greece.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/bIciiee/mudding_drywall_joints_without_tape.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/1fc7e0b1dc3.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/hhgjBgi/76670312514.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/muxozuvalubi/insulated_roof_sheeting_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/archery_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/dokkan_battle_jp_hack_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/tewenedirebusizelexezu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/lockwood_deadlatch_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/confessions_of_a_video_vixen_book_excerpt.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/inventory_control_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/best_pressure_washer_with_honda_motor.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_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 5236 bytes
SHA-256: f86bed07fb2ae682d701e3d656848141110ff27967f7c5ad1343dc21bca4c7ad
font_01_sfnt_off0001163c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163C 10780 bytes
SHA-256: fe77384276ada1b391aa0857bfd9f2926f6dda1bedcef593f72c38f1a99bac9e

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