Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3086225e290eb5…

MALICIOUS

PDF

66.8 KB Created: 2020-12-24 21:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5ca950f1a7eca2732a1a771d939def2c SHA-1: 4cef1f99ed60572fbaaccfedfb5ff329ff8fa7d7 SHA-256: 5f3086225e290eb51ea5f528cf8c1df386eee9d18ec8bc6f35c87bbd742c6fb2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including one to 'trafffe.ru', suggesting it's part of a link farm or phishing campaign. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's primary purpose is to redirect users to potentially harmful external sites, likely for malware distribution or credential harvesting.

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://trafffe.ru/123?utm_term=binding+of+isaac+technology+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fcfe504c4ffa.pdfIn PDF document text
    • https://cdn.sqhk.co/vawikepaf/Jk0taii/zuteporubedanedebuxagaseg.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/HggBqii/30518959234.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/2a4b1e53520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_5f9a9550f0839.pdfIn PDF document text
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/dajinenabupe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/remuv/41797592032.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/kolevajetif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efb8943-0d6b-4f3f-925b-9a800792950d/mass_effect_3_gameplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac06e3f-3ddd-451f-8ed5-5984f495238b/biguxoguvutixalibuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/gajariwuvepesod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27aadda1-3dc2-4949-889d-d64e316bed36/evoland_android_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab0b5c2-65b4-4aa1-b200-402087a2b78a/15653494906.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA42 5260 bytes
SHA-256: e17dc466da44230f993de2b031e5402a748c191047f568c79405f931fdb1922f
font_01_sfnt_off0000cc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC26 10696 bytes
SHA-256: 01dc4609ef56df3371d32a9969fa65de318509862440bff9fda78ed1c3d8a0b3
font_02_sfnt_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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