Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe3951f4bed57d6…

MALICIOUS

PDF

71.9 KB Created: 2020-12-23 00:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 41bb2f4b44328276e14637ec9325260a SHA-1: 469e4657528dacf31315e7de4affe9495af0501a SHA-256: bfe3951f4bed57d68bf994f2b4daec86bd27d205fe962d7356e60b623e527975
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm and hosts external URIs, with one notable URL being trafftec.ru. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=playstation+4+controller+buttons PDF link annotation
    • https://novazoneb.weebly.com/uploads/1/3/0/8/130814043/e934745ae0560c4.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/robumuduluwise/79396400902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd46f43-482a-4d3a-851b-ca6fd039fda2/fadowo.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/zapawifusagozolofel.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/bending_light_experiment.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/afs_global_competency_certificate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ebfe64d-82a6-4385-a3f4-cc8621f66809/aplikasi_hack_fb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/878e10cd-f539-488d-9002-24c68e76b92e/9627383888.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/reddit_summoners_war_promo_code.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/minecraft_cracked_1._8.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/kabulitojamizubudiloz.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_off0000dc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8F 5124 bytes
SHA-256: f19460cb28027f71209aee941ba1def9a9361df66137adfdad3ceb384a1e3c93
font_01_sfnt_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 10716 bytes
SHA-256: 90e58a95bb1f2118f1d261f70afb59f82d7498bbc6b8b0726ac772988d16440e

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