Malicious PDF — malware analysis report

Static analysis result for SHA-256 382b58e6807c1412…

MALICIOUS

PDF

66.9 KB Created: 2020-12-16 04:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19f9408fe058f998409b418ee20d5f8d SHA-1: 44764a197d35baa95a128950d32824c6fa99e56f SHA-256: 382b58e6807c1412ee7317df30c4f4998d6f0af4c9099fbcb222ac32b1cf0aaa
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, 'https://traffnew.ru/123?utm_term=rosemarie+putnam+tong+feminist+thought', is directly associated with the malicious verdict. The presence of numerous links suggests an attempt to direct users to potentially malicious or spam-related websites, aligning with phishing or SEO manipulation tactics. No scripts were extracted, but the structure and heuristics point towards a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=rosemarie+putnam+tong+feminist+thought
    • https://gikudinok.weebly.com/uploads/1/3/4/7/134730402/jozupanomamefe.pdf
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f9a3df87a49d.pdf
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/e1c343062.pdf
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f8f5d65d2ac9.pdf
    • https://cdn-cms.f-static.net/uploads/4416125/normal_5f9be3a3aa4ef.pdf
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5fc032d4c0628.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc170e692c50b1a1e7b565d/t/5fc45dd8f8cdb769c66f6b33/1606704602884/the_hangover_part_2_full_movie.pdf
    • https://s3.amazonaws.com/felasorarabipis/71329077958.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1f084f98375720a9122a/1606295305992/wigavekozizalumon.pdf
    • https://s3.amazonaws.com/rokuwapesu/jidazaxez.pdf
    • 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_off0000c8f6.bin
171695bbc9252e0c5fb2bdff4f74cd0c94d70176e094fe0331f621c886afe581
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F6 5292 bytes
font_01_sfnt_off0000dacf.bin
7198588d98c2037010c37f83fcd52a54ad8c35308ee5c0e25e42f3cdab72ec54
pdf-font-stream PDF embedded font (sfnt) at offset 0xDACF 10408 bytes