Malicious PDF — malware analysis report

Static analysis result for SHA-256 6922d4b0f58e8978…

MALICIOUS

PDF

77.3 KB Created: 2021-02-14 04:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f6e6769a3cd52da7035e049e8e5b5d5e SHA-1: 96285ab7bd7456456a7fef57419d2d1ce89961a4 SHA-256: 6922d4b0f58e89784dd60fccf86235ddaffcb5338e6ccc6fdd08d337636a48b2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or redirection infrastructure for delivering malicious content. The document body, though heavily corrupted, indicates a lure related to sports injury reports, likely to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wb?keyword=raiders%20vs%20broncos%20injury%20report PDF link annotation
    • https://cdn.sqhk.co/suzeboxiwo/i9nxpgc/lagegekefetofalasabojoki.pdfIn PDF document text
    • https://kiteginizi.weebly.com/uploads/1/3/1/8/131871518/6494156.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/hgjqijG/56803001870.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jfoTrgh/movonodipisiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387933/normal_5fd1d5a27bc05.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/ptgihcP/jujokedodaragupax.pdfIn PDF document text
    • https://wobanuwu.weebly.com/uploads/1/3/5/9/135959505/labax_lidebefuf_mokeleru_petebupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_601bb74532e4f.pdfIn PDF document text
    • https://pojewesam.weebly.com/uploads/1/3/1/4/131410485/wewakazudewuvom-tefevufujomux-lokefebekat-dadozikapef.pdfIn PDF document text
    • http://wagajikis.iblogger.org/free_music_to_computer_to_burn.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/DjiDD3X/aimpoint_putting_instructors.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378164/normal_5fcce7d600778.pdfIn PDF document text
    • http://wutigesekigaj.22web.org/fanebilowe.pdfIn PDF document text
    • http://guwejusu.22web.org/imran_khan_satisfya_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/hhhajb7/best_caption_for_fb_pic_with_friends.pdfIn PDF document text
    • https://jogojirodatu.weebly.com/uploads/1/3/4/3/134321770/dd1309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_5fdb5b10c5650.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesiwafo/gdJ8Pja/26207861843.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakepusejedub.epizy.com/coursera_robotics_perception_quiz_answers.pdfIn PDF document text
    • http://zukusuvajijip.epizy.com/kijiduvanoxigewibejore.pdfIn PDF document text
    • http://rexawisoza.epizy.com/58847446838.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_off0000efa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA8 5420 bytes
SHA-256: aaa9700ba0dc6ed2a1fb8a2046dc1c891a5bdc0a3ed8afa13f8494a424f07c0f
font_01_sfnt_off00010239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 10964 bytes
SHA-256: 60e1ed32d57daf37189f3a08a455433268d0c449a34ad5984b1782312f3df8da

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