Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c64b97ddddbad77…

MALICIOUS

PDF

75.4 KB Created: 2021-05-26 17:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e55c9294f207f8f05a7054a4aafb2f24 SHA-1: 1163c53dff521efb2f408584c796efc13411dc42 SHA-256: 7c64b97ddddbad771d54769291ade52d94c794c97ee24561265919ab90b88fc3
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 0.9999

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://druttle.ru/strik?utm_term=bus+driver+game+free+download+full+version+for+pc+windows+8 PDF link annotation
    • https://nobiramiw.weebly.com/uploads/1/3/4/4/134403563/jitagopofejutupuzaw.pdfIn PDF document text
    • https://fodetigo.weebly.com/uploads/1/3/4/1/134109322/e4776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529087/normal_5fd5f4e01015b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488092/normal_5ff2c6ff41967.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5feb9bcf5ef93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_60357a6ab9ed3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454682/normal_5fee3ebc705d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451561/normal_5ff68317acf97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498678/normal_602dd3bd95055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407087/normal_6009fe82b01e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408481/normal_5ff1305720023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464303/normal_5febeefd3749b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_600f14aa32ca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_601fb139004ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_6054fcfb9bddb.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/vitokixogovivubewup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417145/normal_5fce82c366a8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_601a39911d3d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 5868 bytes
SHA-256: fce8807553c5d7628db2cb4188ffdedd4fa02dc04c208848c20ccc6093223766
font_01_sfnt_off0000faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 10908 bytes
SHA-256: 8c85a4fe4f479ebabfffda3dc72869770c8dbb35c7b1d53e499c12e027829af6

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