Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c538decb333ed2…

MALICIOUS

PDF

105.7 KB Created: 2020-11-20 08:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c835133d7b278549aa78ad65bb966ffe SHA-1: 1b5ad902ab4f2a0282b904a2ce1499a7317483b2 SHA-256: 42c538decb333ed2d120ada915f743b6f4dc64189b265feb01fc2a3db04ff121
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely a phishing or malware distribution site, disguised with a seemingly innocuous query parameter. The heuristic 'PDF_SEO_LINK_FARM' suggests the PDF is part of a larger network of linked documents, further supporting a malicious distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=the+little+mermaid+original+story
    • https://sokazavuse.weebly.com/uploads/1/3/1/3/131378988/c7cd07049cb.pdf
    • https://pilovezodono.weebly.com/uploads/1/3/4/3/134313857/rikewanaxakuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d4572e01-d408-49f0-a1a4-923b2480cdc6/61982420414.pdf
    • https://uploads.strikinglycdn.com/files/947d5642-68eb-4f93-8d2b-a1d105a33e2a/zakujifozupolimotinif.pdf
    • https://uploads.strikinglycdn.com/files/7eee5ae2-cc70-43a4-b4da-5e4caaf6a3ba/mupomixegudugebivapoke.pdf
    • https://s3.amazonaws.com/tetenifeme/aventuras_workbook_answers.pdf
    • https://s3.amazonaws.com/wanalovum/zuwetazovigisagafero.pdf
    • https://uploads.strikinglycdn.com/files/925f022d-a6aa-460f-8e53-594a23a21b3c/zamuwerijafenes.pdf
    • https://s3.amazonaws.com/gidibesuxi/campus_design_case_study.pdf
    • https://uploads.strikinglycdn.com/files/48861aaf-555a-40e1-93c5-8a09bd78be73/nujiturodizu.pdf
    • https://s3.amazonaws.com/wegemebufojafak/highest_scoring_nhl_game_2019-20.pdf
    • https://s3.amazonaws.com/wulotugadag/nuselumogufaxotud.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/32563293351.pdf
    • https://uploads.strikinglycdn.com/files/5fd0cb1c-fb98-48c2-bd5e-3878e19aa923/wisoxazepirujinawijino.pdf
    • https://uploads.strikinglycdn.com/files/44c117b8-a657-4718-80b3-db48d7c86e31/gatevitizeki.pdf
    • https://uploads.strikinglycdn.com/files/940d5f60-3d3e-49f5-819a-13d71f587354/dmt_medical_abbrev.pdf
    • https://uploads.strikinglycdn.com/files/567499c7-7891-47b8-8693-f253db9452f1/jeep_liberty_repair_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000162a0.bin
b46fee88f6ffdf4ed4eedc9e149cf3077b88c21bfb31e323885e8e998e9a3e28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162A0 5288 bytes
font_01_sfnt_off00017476.bin
7e8573ace01787a27e3d0bb554d5fff2507b0902bf8705619186da0b655fa771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17476 10840 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.