Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66b66869958a868…

MALICIOUS

PDF

72.8 KB Created: 2021-01-03 13:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91a47d86a79755311ece4193724ccb40 SHA-1: 18282492dc65812e35ac6229595605b80788eeb3 SHA-256: f66b66869958a868887e61e397855dbe8560ae74fbf4c3acf723d64bbf71c24f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The embedded URL, https://traffnew.ru/aws?utm_term=emulsion+polymerization+of+acrylic+monomers+pdf, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to redirect users to malicious sites or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://traffnew.ru/aws?utm_term=emulsion+polymerization+of+acrylic+monomers+pdf
    • https://laxopewivizi.weebly.com/uploads/1/3/5/3/135394850/buvigefek-fipuzofetex-vupofagebower.pdf
    • https://cdn-cms.f-static.net/uploads/4446155/normal_5fb808a0a51e7.pdf
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/2c67e15d.pdf
    • https://buvitefano.weebly.com/uploads/1/3/4/1/134131500/vebawomemuve.pdf
    • https://cdn.sqhk.co/kuzosexiwugu/THjjijA/lozosifivupebagawewedu.pdf
    • https://cdn.sqhk.co/keliziniw/gfVm4r6/flippy_race_hack_game_download.pdf
    • https://nusikunamapuger.weebly.com/uploads/1/3/0/8/130874430/bf3e900665d.pdf
    • https://cdn.sqhk.co/xoradofexul/Vhehdii/adlg_army_list_builder.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gedexim/brush_script_pro_font_free.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/gst_amendment_feb_2019.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_off0000e0c5.bin
b4c1968a165d5601eb12ab5cd4c2267c55e9257ba1927abfa61c383b07756db3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C5 5408 bytes
font_01_sfnt_off0000f32a.bin
141547ddcb46385a820da0a992f3a722338fa3b8d5e9347c23282e2f82d0ca29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 10504 bytes

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