Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c4ee417a378679…

MALICIOUS

PDF

67.6 KB Created: 2020-12-13 23:26:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e5a78535257d06b7429de71869b52bbf SHA-1: 89abe8d4e53a968f4f8e2e159ae226c09886da8a SHA-256: e9c4ee417a378679699da34626ce9f4817d72a78e4d4b1a721cef851ad455b35
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://trafffe.ru/strik?utm_term=pictorial+modernism+era', is likely part of a phishing or SEO spam campaign. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', further supporting a phishing or malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=pictorial+modernism+era PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406473/normal_5fac0830ad672.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/3166263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_5fb5c1b4c6da9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5faa543749cf8.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/pewebopufupe/2019_awards_in_india.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd131452f90b7fe52ecb/t/5fc188131972c46e3cd8cef6/1606518804268/wasipuvawomomedoxewokad.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/pejapigobutovidudinigide.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/mamma_mia_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/bal_krishna_photos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58ba9c89e1c4b8fde24ba/t/5fc80a38c00e7d7965ccc9c5/1606945337126/skyrim_se_summon_dragon_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/25102070569.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_off0000cbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBE 5084 bytes
SHA-256: dae16f1b7f3aa1b58701b29cb792fcfb8617f6da75449fa32178db9e23525b17
font_01_sfnt_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 10440 bytes
SHA-256: 43edf23ef29e2cf2b30cbbc24088ec9c75d5fef24912c0397530e12fb6afd824

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