Malicious PDF — malware analysis report

Static analysis result for SHA-256 6649c5331112a746…

MALICIOUS

PDF

78.0 KB Created: 2021-03-07 23:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 60719ac688a7921d91ef1e6f3992d454 SHA-1: 9cb6a616c8cb828a22866473f6cdb9b30fd7785f SHA-256: 6649c5331112a746d9175383ca99493a6430561a64754a953099c1c04dee6e88
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=canadian+minorities+in+ww1 PDF link annotation
    • http://pressit.fun/81334624943i8x4u.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/vikixutimupur_bevafimudonex_dovuza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418587/normal_5fdd7704996c0.pdfIn PDF document text
    • http://nasty666.space/competing_visions_a_history_of_californiaz1x06.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/dikun_nadotuta_demidi.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/0hghe0q/cartoon_network_schedule_usa_2019.pdfIn PDF document text
    • http://austritkfa.com/new_video_games_2021a2u9q.pdfIn PDF document text
    • http://cheapkeys.site/40447710508nhyvz.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/72573945161.pdfIn PDF document text
    • https://demaxezobenila.weebly.com/uploads/1/3/1/8/131856353/kubupelosis.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/eigggPg/73841212435.pdfIn PDF document text
    • https://lamamamim.weebly.com/uploads/1/3/1/6/131606140/makaben.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417536/normal_5ffa8b333df7a.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/bebizadajakilivirasefliwr.pdfIn PDF document text
    • http://portkamesto.site/mezuzegerapowokug1vtp.pdfIn PDF document text
    • http://cocobeautybar.ca/53058227505m813b.pdfIn PDF document text
    • http://telgrm.site/64891266890zt0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477408/normal_6041d06cd9d42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482418/normal_5fca0934f0e73.pdfIn PDF document text
    • http://supermagazforsale1.xyz/animal_cell_culture_protocolpkrjr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/yo_yo_ma_fort_worth.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/46371307828.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_off0000f5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BB 4988 bytes
SHA-256: b959eb11e8ae789b9bd1a09e598a9ec33eae5e30e86e7f1800673c926231a256
font_01_sfnt_off000106ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AD 10616 bytes
SHA-256: cf58bf1f3de75f390aa1a875c3b9be62784b8a7db9c7002d5d086b0315e615f4

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