Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f6cef9e0570724…

MALICIOUS

PDF

80.2 KB Created: 2021-03-25 15:18:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eea601980421a2faf7537a4eab5540dc SHA-1: b22880ffda05c312a2b73bb43f9be9a84ebfeaaf SHA-256: 71f6cef9e0570724959c88510c845b4b990273d61ac35f05c38d84a201addd15
156 Risk Score

Malware Insights

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

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 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=battlefield+1+pc++highly+compressed PDF link annotation
    • http://vidavapazideni.iblogger.org/xatuvowigotutigevuwi.pdfIn PDF document text
    • https://pekeweluxema.weebly.com/uploads/1/3/5/3/135304067/2261405.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/ahiihFb/13113017167.pdfIn PDF document text
    • http://fefebigaxef.iblogger.org/budgeting_and_financial_planning.pdfIn PDF document text
    • https://namosozevo.weebly.com/uploads/1/3/0/9/130969937/9c6b90164d15.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/xM97xib/5947701601.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/80553626695.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/fyvidjh/lupik.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/ieXigly/18008781057.pdfIn PDF document text
    • https://mubazujozij.weebly.com/uploads/1/3/4/7/134705676/zufadusejekewixo.pdfIn PDF document text
    • https://nokemodikobo.weebly.com/uploads/1/3/4/3/134308311/3715798.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/84715424905.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/tugumeb/24646148639.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/vatejukulajovuta.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/today_news_paper_times_of_india.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/cloudformation_boolean_condition.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/binding_property_in_xamarin_forms.pdfIn PDF document text
    • http://pizitibasowu.atwebpages.com/how_do_you_use_a_stanley_jump_starter.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/58550489879.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 5772 bytes
SHA-256: faa7d5ae7181e53c31415c1fcb0eb725c7277a846672bc4c65df20868d2fa16a
font_01_sfnt_off00010537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10537 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00010dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC5 10972 bytes
SHA-256: 848c309b79e5423f541927ed7988a8358d8d4ad8f8d6a75ae8209fa8e17054a5

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