Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7464b2b5aadfcf…

MALICIOUS

PDF

63.8 KB Created: 2020-12-26 19:56:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bdc6a6b7f1b51b5a2da61cd76a02dbf3 SHA-1: 95fcd9dad7d50caa52d3c2322dd896a10a955cb3 SHA-256: 2f7464b2b5aadfcfdff5c4d67871dec943c990367f7edaa4709abfa5e7082d05
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://trafffe.ru/123?utm_term=milwaukee+2763-22+m18+1%252F2%25E2%2580%25B2%25E2%2580%25B2+inch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453098/normal_5fb58f6fa122b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5faae014e4841.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f892895e8e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466661/normal_5fac0ff11f5ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5f8b535701dc8.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzezajolu/TojxapE/togemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5fc3538b9b48c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f96db2544ecd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451231/normal_5fbee7f82ea46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5fa8852757220.pdfIn PDF document text
    • https://joruluzadazalit.weebly.com/uploads/1/3/4/6/134673717/tokadonof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5fd18133990c8.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/muvemasoxaji/first_impressions_salon_frisco_co.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_off0000b702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB702 5808 bytes
SHA-256: 7314e56268a509c92a8b1710cde01c91e4e7d6135dbd33f6bd1f2f11c5e96f5b
font_01_sfnt_off0000caeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEB 11272 bytes
SHA-256: b746f47c8c7d85bc24f842ac329f20ffb3a73724875fb78c6708fe9b15539716

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