Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a112ac800e1023…

MALICIOUS

PDF

80.1 KB Created: 2020-11-10 12:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48bce0fb66054301b9507fff0fbd0261 SHA-1: 1cccfe2be8b1a9f3ff016fe934b1a0d04518a7b0 SHA-256: 29a112ac800e10232274284a0e3bbe135a1f691b8b9603678c577b8c4d37f00f
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and directs users to a URL that appears to be a lure for a driver's license manual. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and extensive external linking suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://traffking.ru/aws?keyword=texas+driver+license+spanish+manual
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f8fa2fed8816.pdf
    • https://cdn-cms.f-static.net/uploads/4444877/normal_5fa5da5c14de8.pdf
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/gonedanukulu_xafagojewa.pdf
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/f7fa2.pdf
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5fa3d036b296f.pdf
    • https://cdn-cms.f-static.net/uploads/4408336/normal_5fa243eb2f199.pdf
    • https://cdn-cms.f-static.net/uploads/4422150/normal_5f9b76b4f0bd5.pdf
    • https://kuxilididid.weebly.com/uploads/1/3/4/3/134387830/2054953.pdf
    • https://cdn-cms.f-static.net/uploads/4418764/normal_5f9b935058510.pdf
    • https://nilanifek.weebly.com/uploads/1/3/4/4/134466172/bogubifunux.pdf
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f9ba3706162a.pdf
    • https://cdn-cms.f-static.net/uploads/4407318/normal_5f9678bd9d8f5.pdf
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5fa112e9f422d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd0d.bin
05dc1c3a9ad2e25c954af42d14874fae7b6f7e9e1198809f5fc53345f41d6158		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0D 5388 bytes
font_01_sfnt_off00010f3f.bin
cfdeb2be01afbb7363905ede27eaab99cb37ebb8a5fdb94f52effb2249e87e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3F 10488 bytes

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