Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d89ed4b4372b14…

MALICIOUS

PDF

65.0 KB Created: 2020-11-26 08:21:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6b7bc1d722a8fdbaf0e65ecc05b8bb85 SHA-1: 157f0c6ed8f780be90f685596d1437fa5cdf8745 SHA-256: d1d89ed4b4372b1448a7d68ddb24d8702424649eb4e26756cb449f0dc5216047
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of a PDF link farm heuristic suggests the document's primary purpose is to redirect users to numerous external URLs, likely for SEO manipulation or to serve as a distribution point for further malware. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a phishing or malicious redirection attack.

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://traffset.ru/strik?utm_term=yamaha+banshee+350+hp PDF link annotation
    • https://bolomekedi.weebly.com/uploads/1/3/4/7/134769876/472615.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3a2804fcfa8c.pdfIn PDF document text
    • https://ramujodavuratot.weebly.com/uploads/1/3/4/6/134667495/4820b0.pdfIn PDF document text
    • https://refunijuxi.weebly.com/uploads/1/3/4/7/134748157/zovik_nuruju.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/c14f3105-032c-4dab-abea-acd40bfe6216/99877763112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6807091-77ec-44b6-9d94-4cf993dab0f6/boeing_747_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/disorientation_guide_uchicago.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/call_of_duty_advanced_warfare_gameplay.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/dodozalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6c3237-e60a-4b87-a27d-014f04a4697a/flying_fish_from_mario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386a2049-3330-4032-b4f2-808caaa7ef1b/nezugugilimefosimoraponud.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_off0000c0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C8 5460 bytes
SHA-256: f261b1ae7e89e0f144d0ecfcf4527c3b734dc76edfe66919726fb085c5bd6495
font_01_sfnt_off0000d335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD335 10792 bytes
SHA-256: 2ea352caf4326638cb00a6083dc6221a8e5e5d6caff86d29eefd7613610069f9

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