Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f50da61b0ab71a…

MALICIOUS

PDF

59.9 KB Created: 2020-12-18 20:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 63a578b2d69ffe92293b395e3a5e2cee SHA-1: 6f85846df56fc99c29c17c7c7e5c94927fc24af9 SHA-256: b9f50da61b0ab71a1c46fe6bfa273eb87c293cd86ffcd522c7ab0e53ba9b0003
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains an embedded URL pointing to 'traffset.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to IKEA mirror assembly instructions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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=ikea+minde+mirror+hanging+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458124/normal_5fab2b8a5ef45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f89e5c640a9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/puzuturukofub.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/42186813076.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/kumixarofemuxumepidutumiz.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/unlocked_jigsaw_puzzles.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/bhagavad_gita_book_in_hindi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/blood_sweat_and_tears_full_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/10799515187.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/yasin_file.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/character_development_books.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_off0000af26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF26 5320 bytes
SHA-256: 342193ad0a0e6da9cda419811a8bfc5ba6d04e88949186f7e59fdfc648378abd
font_01_sfnt_off0000c11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11C 10032 bytes
SHA-256: f4975349f75e0f59fea10aaa7f027ea334185a3c77f9a567067ad77952d8525b

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