Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c417d8b8ffc1b0…

MALICIOUS

PDF

86.1 KB Created: 2020-12-02 18:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 49d7fdf9671a3401aa802c7a1cf12de9 SHA-1: d9dcd107e76bd2d0e3053dbf15e985f45501d89b SHA-256: 36c417d8b8ffc1b0aeb8e11239bca0d526b78713e23607ddf043b57448e2faf5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=dragonvale+cheat+codes+for+free+gems PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f95839689a39.pdfIn PDF document text
    • https://lazekikobetilof.weebly.com/uploads/1/3/4/4/134443651/duvewifilafevebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f953ac748fac.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/53367001-1fae-4e40-b160-3a7e25989674/22321633498.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c2a18e72e5fdbcdeaca/1606372395331/sezilifova.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfb2312cf09257bd651d14/t/5fc3e087fa04221c71974599/1606672520118/famewexejobirovujok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b117a355-8269-4872-9995-a999efcefdde/85237823186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43561ffe-33b9-4aea-829f-864e204e077b/kefarepare.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/payg_payment_summary_annual_report_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35094e0-6c55-46bc-928d-73bda77c9229/letme_watch_this.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2c8a1e-546f-4d65-8159-c4f419323d5a/16045095721.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c991c6d9645836219624/t/5fc64802a97599144ecef2fe/1606830082335/family_chantel_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/22370768175.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/getikisiletaselipete.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_off000115d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D3 5492 bytes
SHA-256: 6534189d0b6bc0ce96a6cc4641c69e0b40ee615215e367626a08fda344c1cd24
font_01_sfnt_off00012869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12869 10152 bytes
SHA-256: aef58be4459dc5f3f2791250e74887cf26fb87760ff917d29522c42839496772

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