Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e42708c2ac440aa…

MALICIOUS

PDF

84.4 KB Created: 2021-04-20 16:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ece56418baba77a0152c1fb34848454e SHA-1: 2822a9a11056012d7e52e6fc779c3bccfa929731 SHA-256: 2e42708c2ac440aaa4369a9807eef5e5531a4f795082193cda09b894d26fe486
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'fokemale.ru' and using a 'dell+latitude+e5400+screen+won%2527t+turn+on' query parameter, suggesting a lure to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=dell+latitude+e5400+screen+won%2527t+turn+on PDF link annotation
    • http://prizinsta24.space/kevin_love_injury_report_rotoworld8ehh3.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/jjYs7ic/35176424504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_601bb909b6c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503390/normal_60253daf70673.pdfIn PDF document text
    • http://nesobaka3.xyz/sword_art_online_alicization_best_characters4z74w.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/gNibujh/tubby_todd_coupon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_60510b3d37046.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/jqVgfAO/fibigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_6014ddcc73d61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494431/normal_6023dcab68f0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffeb460-9262-41d1-a26a-2ac3585096a5/ryobi_miter_saw_dust_bag_home_depot.pdfIn PDF document text
    • http://jovesiresumu.rf.gd/xukamisanino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6772c3e-615b-4cc9-ac0c-411b382310cc/79796055518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a59e2c94-e74b-4c74-9278-e4a940099b9b/femupemuvapejafa.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/rawesiterat.pdfIn PDF document text
    • http://devoweba.rf.gd/80139746894.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/cars_movie_in_tamil_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/47435457700.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/sulefalerefexuperuvawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fe6d1a-bc3a-425c-84cb-2fc234afd749/how_many_days_a_week_should_i_workout_to_see_results.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/53187763374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/267a385a-2315-4246-96c7-4587745f2c63/is_oshenwatch_any_good.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_off000109bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BF 5412 bytes
SHA-256: 6ddd37566c88ed7507d98271d40667ea4138410ecf5a519dc881c4e7b138c059
font_01_sfnt_off00011c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5E 11220 bytes
SHA-256: 6b2c78020da08a608e78929d63d8da3622f41e1336924a4033b07d1a7a98ff33

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