Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f33f81bdb12253…

MALICIOUS

PDF

70.8 KB Created: 2020-11-17 17:35:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b2b426866a685fc118591236ee14e685 SHA-1: 1251c62fd3008a5b0acb99053c893a090610dbde SHA-256: d6f33f81bdb122538d8025f55523885d881704af17e1653f5ccc0040408fef56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to S3 buckets, which is indicative of a link farm or SEO spamming technique. One of the primary external links, 'https://trafffi.ru/strik?utm_term=gta+sa+ger%25C3%25A7ek+hayat+modu', is flagged as suspicious and likely leads to malicious content or phishing. The ClamAV detection and ML classifier further support its malicious nature, suggesting it may be a phishing or trojan distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=gta+sa+ger%25C3%25A7ek+hayat+modu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5fb32a0c2999f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f9a704c764c9.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/103603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475375/normal_5fa4c7b1ba732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8707eb09c59.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/vovabagubajegeb/zenewuxowisutokamuzesuk.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/bisivexasiwufenede.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/adp_payroll_calendar_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/67659374038.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/beauty_and_the_beast_auditions.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/74600394051.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/trellising_raspberry_plants.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_off0000d4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F1 5588 bytes
SHA-256: 1f307a68349a216390721c177421475ae83cddbcf503a5bad0f408231f108039
font_01_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 11780 bytes
SHA-256: 19a89c8407291324646a6322c6dd1f049ef09d55ebbb5602643faf660398ee40

Open this report in the interactive analyzer, or submit your own file for analysis.