Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d2e475f7e413b1…

MALICIOUS

PDF

86.6 KB Created: 2021-05-28 05:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9beb0d77b331ed74d84b17086192eeb SHA-1: 2607df6161e6246495f32479ec1da574da875290 SHA-256: d4d2e475f7e413b1e3c564da93724b8d66a4116016c70dde47f084e9fc699a1a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of many Weebly-hosted PDF links suggests a link farm designed to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=disarming+the+narcissist+surviving+and+thriving+with+the+self-absorbed
    • https://wugizagopa.weebly.com/uploads/1/3/5/3/135311922/7fb28316.pdf
    • https://cdn-cms.f-static.net/uploads/4421366/normal_6016ebba7b588.pdf
    • https://ralutadepijug.weebly.com/uploads/1/3/5/3/135305627/bubafemipatu.pdf
    • https://wasaxedunup.weebly.com/uploads/1/3/1/4/131453111/1534757.pdf
    • https://static.s123-cdn-static.com/uploads/4407749/normal_5fcc559aea604.pdf
    • https://vapatukubarokul.weebly.com/uploads/1/3/0/7/130739856/dumedegojikipit.pdf
    • https://cdn-cms.f-static.net/uploads/4459914/normal_60221096e9661.pdf
    • https://cdn-cms.f-static.net/uploads/4404739/normal_603a892361a02.pdf
    • https://cdn-cms.f-static.net/uploads/4444649/normal_605ee78fc6901.pdf
    • https://cdn-cms.f-static.net/uploads/4375350/normal_604cef1c5b3b9.pdf
    • https://vemuwusikive.weebly.com/uploads/1/3/4/7/134733059/2889492.pdf
    • https://cdn-cms.f-static.net/uploads/4375095/normal_602f09e11adb9.pdf
    • https://static.s123-cdn-static.com/uploads/4370053/normal_5ff78ead49619.pdf
    • https://lesinagin.weebly.com/uploads/1/3/1/4/131454304/4465304.pdf
    • https://static.s123-cdn-static.com/uploads/4366063/normal_5ffc3457a89ca.pdf
    • https://static.s123-cdn-static.com/uploads/4372378/normal_5ff4dcd7b4fc5.pdf
    • https://cdn-cms.f-static.net/uploads/4406202/normal_602ad871e6223.pdf
    • https://static.s123-cdn-static.com/uploads/4426541/normal_5fdf9b39e226c.pdf
    • https://cdn-cms.f-static.net/uploads/4393179/normal_60288e2ac6fe4.pdf
    • https://cdn-cms.f-static.net/uploads/4470401/normal_603b6d59e218e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0eba8031-f6a5-4109-8a63-867738ea3cc1/15326916669.pdf
    • https://uploads.strikinglycdn.com/files/4b50448b-1199-4d48-8d58-0e724218fcd9/woodworking_wooden_mallet_plans.pdf
    • https://uploads.strikinglycdn.com/files/2585e102-a860-4c5b-89ae-a7f6fccdb5cf/xuwizaxaxapujokis.pdf
    • https://uploads.strikinglycdn.com/files/b78de302-5238-42cd-8a12-78b5cd198795/zalojumofolegag.pdf
    • https://uploads.strikinglycdn.com/files/aa9260c4-40a0-4d09-883c-24abd32b660b/2021_codes_for_arsenal.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_off000111ce.bin
255e28d002ce9cda835cdb4d21c9c80db1cf08d502d0447ac1f8644677f6aa13
pdf-font-stream PDF embedded font (sfnt) at offset 0x111CE 5760 bytes
font_01_sfnt_off00012560.bin
d101fd628f221cc411af188f6ea9cca3d0ac32403a25b58c12332c9408ed543f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12560 11344 bytes