Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7d07467f14f875…

MALICIOUS

PDF

67.6 KB Created: 2020-11-19 16:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fd25d262862ba7139ac1f5ce74c8f24c SHA-1: 965f35ffb9fde47934bb9482646f90138aa9a611 SHA-256: da7d07467f14f87530bcff5ba11fd0a2c293297e6642cd488bc4a9a7c4e3c1eb
156 Risk Score

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://trafffe.ru/aws?utm_term=album+gaana+audio+songs+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f8a7a3ebd50a.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/7036390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446914/normal_5fa67a45ea591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8a409220f32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f9010d598fb5.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/7057dac0d31db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f8d9eeee2c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5f889811dda59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5f8f84eb50702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_5f9d5556632a6.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/xenavuxa/30361094814.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_off0000ca3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3C 5356 bytes
SHA-256: 2152006d98e827a8fb15d5572efd1083f344b54e0ebda8f4b24d45ea853aa81e
font_01_sfnt_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 10956 bytes
SHA-256: e2c589598499e4258fc359ea08efc95f128f7c120bc293cc1cb901a3df4ff0fe