Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e4523923fdab16…

MALICIOUS

PDF

79.2 KB Created: 2021-05-08 19:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7a64bdfba6118dfc4ece3753f7b42fb7 SHA-1: ddef5070b2e5b8cb78011dfe5c53e16c33e6e4b8 SHA-256: 95e4523923fdab16263a36dd34780b0ed5ed0981883b4dd5a998129e11d8823d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://vilenefex.ru/strik?utm_term=hp+p2035+fuser+removal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403540/normal_60207b4bbc049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365653/normal_5fdd416396feb.pdfIn PDF document text
    • https://guwepejesa.weebly.com/uploads/1/3/2/8/132814432/puzurowidenosedateg.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/jdidBSQ/57522568118.pdfIn PDF document text
    • https://zidoboxeped.weebly.com/uploads/1/3/5/3/135324118/kazojige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_6036b515a7f2f.pdfIn PDF document text
    • https://cdn.sqhk.co/sofuxizago/ghgiZje/libaketizolumamixesibiw.pdfIn PDF document text
    • https://fasorijaj.weebly.com/uploads/1/3/4/5/134501708/787ef50aefeda90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_60459c9de2efd.pdfIn PDF document text
    • http://pelubexeto.getenjoyment.net/89751340190.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/lateral_thinking_puzzles_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • http://majovevalaji.sportsontheweb.net/certificate_of_appreciation.pdfIn PDF document text
    • http://kexumojazo.mypressonline.com/metabolisme_anabolisme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_5fd69c41bf666.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wivaxodi.onlinewebshop.net/list_of_corporations_in_tamilnadu.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/kufesoparizanilurej.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/how_to_calibrate_maytag_bravos_mct_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/bionicle_the_game_ps2.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/pulse_polio_programme_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/compare_two_excel_sheets_for_differences_vba.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 5632 bytes
SHA-256: 352489961096f84586974f6f14da5121e964af57bfe2ad282e1faee3d2a43f4a
font_01_sfnt_off000109f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F5 11180 bytes
SHA-256: 4f19504282a0e670b538cc46b1d7437ad43c73f59edc7692a4d81636d3144a07

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