Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab06e942e9a0f9a4…

MALICIOUS

PDF

67.3 KB Created: 2020-11-26 10:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2353270144ccb82c65a3247e0cae798b SHA-1: 7709e906fd55a5359e346a8252df390c0d89da4e SHA-256: ab06e942e9a0f9a4533cecc14c0b2132d642ddad64ef1b83b5806063be126b45
164 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically referencing invoices or payment requests. It also contains numerous external links, with one pointing to 'trafffi.ru', suggesting a potential phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious, and ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffi.ru/123?utm_term=if+purchase+allowances+are%25E2%2580%258B+granted
    • https://cdn-cms.f-static.net/uploads/4418565/normal_5fb8b8b62642d.pdf
    • https://cdn-cms.f-static.net/uploads/4462093/normal_5fa89393f1b96.pdf
    • https://zozesikijep.weebly.com/uploads/1/3/4/5/134586683/1633271.pdf
    • https://rewekofewu.weebly.com/uploads/1/3/4/6/134654248/tumuxoru.pdf
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f87748ae3227.pdf
    • https://likivaduzizi.weebly.com/uploads/1/3/4/6/134699319/8d59ce34692.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ronatiduzoxij/52073796662.pdf
    • https://s3.amazonaws.com/lurutopobi/gewokomuleb.pdf
    • https://s3.amazonaws.com/vunizi/siwaxemepowiwetuzuzitigel.pdf
    • https://s3.amazonaws.com/vabedafozo/my_hero_academia_heroes_rising_subbed_stream.pdf
    • https://uploads.strikinglycdn.com/files/d787c754-ea53-45d9-bc8a-fbf09b7eb928/fable_of_the_downstream_people.pdf
    • https://uploads.strikinglycdn.com/files/4145471f-7124-4c8b-8377-b96d7f8da3f0/wipazemefod.pdf
    • https://uploads.strikinglycdn.com/files/99d7a8de-b783-4dbb-a64f-e8eb8ed247fe/19331199339.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_off0000c8f7.bin
4885934d76ad045da538afbf3c105186b1ceebc02cd81c1243a88bdc00602357
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F7 5452 bytes
font_01_sfnt_off0000db98.bin
6d3d97359d75df5a1a0465c72438137fa4166cf2a52745b237624637c12d0e68
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB98 10208 bytes