Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb8542ffdb30e39…

MALICIOUS

PDF

72.4 KB Created: 2021-03-28 09:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6af7353a92d9737a3f88ed12e88f859c SHA-1: 570454006eab8aa68409915beaf134227a93e2d6 SHA-256: 7cb8542ffdb30e3916bbc4355fd34a2626ca3f92444204071b26c978d1cb75d1
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a URL that appears to be a lure for downloading software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple unknown URLs further supports this, suggesting the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/123?utm_term=driver+booster+6+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456399/normal_601fe1a51e233.pdfIn PDF document text
    • http://emirofficialzm.com/box_simulator_for_brawl_stars_app_storel1yi1.pdfIn PDF document text
    • http://remontlegko.info/thank_you_for_being_late_thomas_friedman_review1rdrg.pdfIn PDF document text
    • http://mon-cmbretagne.com/whitfield_pellet_stove_parts_near_meug63q.pdfIn PDF document text
    • http://dvigatel.guru/40_rules_of_love_elif_shafakd4tsj.pdfIn PDF document text
    • http://creamwalls.space/gejugadinonej7eiw6.pdfIn PDF document text
    • https://cdn.sqhk.co/poxudanefisi/XMG5DH1/infinity_train_simon_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_603a0b1639b43.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/Iiblyjg/nubuduzumujidujuj.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/21876678914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452392/normal_603f45ab4eaff.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/zibenoroduzuw/job_vocabulary_test.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/judipumir.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/72585057546.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/80836721486.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/appropriate_technology_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/best_action_movies_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/the_world_of_the_witcher_collectors_edition.pdfIn PDF document text
    • http://xidalagep.myartsonline.com/iaaf_world_records.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/sawevapigugosemegaga.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_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 5036 bytes
SHA-256: cf051e8930f44a8416f02894f4660e733756fbd0079df12d3361f76f8fd863bf
font_01_sfnt_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 10048 bytes
SHA-256: 6faf16feabe018b951bcbf213df6cccc3eadf7d25f66ca301df1eadbc0dfd73a

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