Malicious PDF — malware analysis report

Static analysis result for SHA-256 467dcfff53fc6cf0…

MALICIOUS

PDF

69.8 KB Created: 2020-11-23 16:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 06ea41a01d13fea211a9679bf14073a0 SHA-1: d4000c4b24c2c44d023f74c0374562aa5e15a122 SHA-256: 467dcfff53fc6cf04d37bdd6362aa6730d7017b6ccdd38a9dba9f680c2be8780
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 0.9997

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 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=secondary+math+1+module+6+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8a6d98bfd59.pdfIn PDF document text
    • https://riwominejakubik.weebly.com/uploads/1/3/4/5/134598273/8ebddb4eff78.pdfIn PDF document text
    • https://vezexozozufizus.weebly.com/uploads/1/3/4/3/134372857/sidupap.pdfIn PDF document text
    • https://teguvubab.weebly.com/uploads/1/3/4/3/134347924/677d56c296.pdfIn PDF document text
    • https://puvavijage.weebly.com/uploads/1/3/4/4/134461845/tosutobogib.pdfIn PDF document text
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/49c028f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_5fb837e0d3960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5fb48b6c68d62.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/7910283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5fa711b38d4af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_5f941a0fc92c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f9d0f5c4df52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC490 5516 bytes
SHA-256: 731a0c63b2dad39c32de1f11972c5ac39c7a53c7e1630fba5febaf350ac7b232
font_01_sfnt_off0000d727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD727 11036 bytes
SHA-256: 97b9215ecb439dabfa0bffd40b975dacd116ba375f07196ed1a3e96baa2caaad
font_02_sfnt_off0000fcb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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