Malicious PDF — malware analysis report

Static analysis result for SHA-256 976cf17ee6c42e6f…

MALICIOUS

PDF

66.9 KB Created: 2020-12-21 23:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 24274647842c6813424370a1f4004d80 SHA-1: 7801ac648ae07e8480b7e66dd821d98de8951a70 SHA-256: 976cf17ee6c42e6f994937990c1afc2fe205db054f0536562c2b6a2f2d60309f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://traffset.ru/strik?utm_term=bounty+hunt+western+duel+game+mod', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://traffset.ru/strik?utm_term=bounty+hunt+western+duel+game+mod PDF link annotation
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/3688024.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/6c4568c894cb1e.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://uploads.strikinglycdn.com/files/218635b7-2846-4bbf-9130-e6f290d14b12/44382841672.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c82527a199023ab4b7a9/t/5fcedfbd8b174454e98fcc27/1607393214693/7985318853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9748a119-b4a2-4836-84cf-d6db1e7728f4/71374546223.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc826ac3cfda2dcf0aa550/t/5fdc96d599d54e3fc07e9c70/1608292053694/radial_blur_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/734b1823-5bdb-4e4b-b543-e55dc9c5f76e/josef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bee43ed-9a69-4f4f-8371-ab37951b6ae7/san_francisco_topographic_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a59f39e-a887-4bb7-82ea-52fd7f110336/math_kangaroo_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/fenufapufemabibifada.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/mandated_reporter_stearns_county_mn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43358f1e-a766-4c1d-a6e9-b7892f1fe326/sugatudavux.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_off0000bbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFB 5316 bytes
SHA-256: 8faa1ac4773fa425c07306a9fec0d8a898296f65017852335048dcead545dff7
font_01_sfnt_off0000cdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFB 10176 bytes
SHA-256: 1c6d25342097fb06e53428217f7c4b116f0f8a7addeb0061832faf4e5b9ad4b4
font_02_sfnt_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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