Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f987ef55e20e47…

MALICIOUS

PDF

66.4 KB Created: 2020-12-24 01:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6c7cbab9de1ac24ebc89f13cc0192204 SHA-1: 78d28bb706645cd4cba9ce4be3d3529a3d2ee164 SHA-256: b5f987ef55e20e47d3d289f5cf48405577c16bbe5186a585770acce5bb31ea56
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to potentially malicious domains, and the document body, though obfuscated, contains text related to colors and application metadata, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=mix+colors+to+make+red+orange PDF link annotation
    • https://mogiveruxapexi.weebly.com/uploads/1/3/0/7/130775775/vubiloxerevarexexo.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/ibjePia/fantasy_flight_star_wars_board_game.pdfIn PDF document text
    • https://cdn.sqhk.co/ratugetaj/jfjfiaw/31310845828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_5f941ada6e049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_5fab14f993304.pdfIn PDF document text
    • https://sejelenowoloza.weebly.com/uploads/1/3/4/5/134518320/gejabudumupi.pdfIn PDF document text
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/9ae30023f80.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/6a6e67245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365601/normal_5fddb42105c7d.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/tadovu/the_pearl_chapter_6_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/xanaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/lucy_2014_movie_download_mp4_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/teri_aankhon_ka_yo_kajal_pagalworld.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_off0000c5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E1 5396 bytes
SHA-256: 6a3cc3a9782900790e0d85c2e3386f0851af8799b2bfe0d05ce7c23a91e55727
font_01_sfnt_off0000d832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD832 10980 bytes
SHA-256: 26be633abeadb010eeb14b0a30b1dd536a384752bba63b975f54c8f44caa00fe

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