Malicious PDF — malware analysis report

Static analysis result for SHA-256 7250cd4f33c19ffe…

MALICIOUS

PDF

75.1 KB Created: 2020-11-25 12:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c8c244d2c53c1f6b9a30e59d482cfed5 SHA-1: 93b69170224ee3f47bb203ba6aa018eb5034ea3e SHA-256: 7250cd4f33c19ffe6d14ead5cc8ab09afb91a4c8f61c02a106e8b3d9da8ca5ef
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to seemingly SEO-optimized PDF files, indicating a link farm or content-spinning operation. The primary URL, 'https://trafftec.ru/strik?utm_term=remote+controlled+jet+plane', suggests a lure for users interested in remote-controlled aircraft, likely to redirect them to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=remote+controlled+jet+plane PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4527164/normal_5fbe27c9e8d02.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/saduxasuposuvit_madademabosapul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_5fad9d899b056.pdfIn PDF document text
    • https://bexepusukanuv.weebly.com/uploads/1/3/4/7/134775428/zajasupu.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/mijimime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_5fb340946bff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f8f8d5f68259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_5fa5972dde50c.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/81701878-3855-453d-978e-fd9b314fd7d5/9408477027.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/demon_hunter_leveling_guide_bfa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9940aee3-f459-4b1a-946b-076374026cb1/english_spelling_worksheets_for_grad.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_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 5124 bytes
SHA-256: f9682f1d583a294f5618b6385b76e134d71545564339ea8f9377247cf264c66b
font_01_sfnt_off0000fa90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 10956 bytes
SHA-256: c7d090b89e0969a1b88a6f4b08daaf3cdc77fb97a52575a8e8943763c2917ddf

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