Malicious PDF — malware analysis report

Static analysis result for SHA-256 188067511c88f6c3…

MALICIOUS

PDF

67.0 KB Created: 2020-11-11 03:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ff65d6054c5b538ffeb74516b210c45e SHA-1: ea81ab5e3eca60b7fd4ea5687ce539ce356b0358 SHA-256: 188067511c88f6c3e738c062f3c94b8051b048ab498471ca838bd475e6bc132a
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector, specifically 'traffine.ru'. The document body, though heavily obfuscated, suggests a lure related to a 'Volkswagen beetle repair manual'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/123?keyword=volkswagen+beetle+repair+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_5f8ea50ec9aea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f8de1580ae00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f924751b83b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_5f9620c4ce7d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5f8f62456c82b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fa4d38479e9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5f9bb33284dbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5f94f650335b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15a6f2f-18f5-4515-9822-759bfb0a321e/fermi_level_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/how_hiv_infects_cells_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30c0ff9-f295-4f66-9923-cbab8bcefc55/2223356811.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/shrimad_bhagwat_geeta_book_in_hindi_download.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_off0000c794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC794 5400 bytes
SHA-256: de87c9dfba8e5f23cc22faf7fbee696e5e6adf5c92bb5706c6af32729f79a820
font_01_sfnt_off0000d9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F3 10932 bytes
SHA-256: 036ebe7c41cf35c341ec4b5c4001e86e9473b50c04b56fb3a92d6970167c01ad