Malicious PDF — malware analysis report

Static analysis result for SHA-256 97349d673d88c5e8…

MALICIOUS

PDF

81.0 KB Created: 2021-01-01 18:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8ee1470b858b4b13aed5ba85c6d860c5 SHA-1: b75e39975a4afe454aac33c5ad4f007ac715063b SHA-256: 97349d673d88c5e89f8720eb587a2fd90061f6aa0a0684702aa0030b7b32f8ef
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to malicious sites. The primary malicious URL identified is trafffi.ru, which is likely used to host phishing content or distribute further malware. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or trojan delivery.

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://trafffi.ru/strik?utm_term=build+battle+game+online+minecraft PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423453/normal_5fb72d55028fa.pdfIn PDF document text
    • https://rakurewirusemew.weebly.com/uploads/1/3/4/0/134017151/8748105.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/8573287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5f8e1f5b898c7.pdfIn PDF document text
    • https://mizitixas.weebly.com/uploads/1/3/4/5/134589849/xaxovukurufumadam.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/ac8446a0-d6f2-4471-b37d-c3315d32e20c/plant_webquest_activity_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50afb7d4-192e-4948-a761-b9bb034e2457/79183291177.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/busy_busy_dj_song_pagalworld_com.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd9aab8-6dbe-481d-91cc-d207dcabe4df/48894087360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feabd314-300f-46d6-a17f-6476b6054330/pidaroper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b39a7bf-222b-45f8-bd01-929eb65c5517/76508376019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2780ff61-5e37-4cad-87fa-8c9eee982b77/pepebosigogipaxijukadin.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F0 5352 bytes
SHA-256: 6471c93afeaed387986c6e7c41afd73e747abda34c2c1bedeeb87ef808ec640b
font_01_sfnt_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 10688 bytes
SHA-256: 33218f22f45ef95e2bc701fed692d0bd413da44906c734c529ed91eaf19f2675

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