Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d17f69158a23cb8…

MALICIOUS

PDF

70.6 KB Created: 2021-02-22 12:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 26e3e256a12a4d670a21b015e158574a SHA-1: eab971a1abcb74556b2e247bcc392a24fd84049d SHA-256: 4d17f69158a23cb893ea0e0c33c605b6410796d7e31d0df0d49a8acf21ad64aa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous external links, including one to 'bologen.ru', suggesting it is part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into visiting a compromised site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=canon+mg3520+software+download+for+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410027/normal_60127f56b32a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416798/normal_5fde5f9d7100e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_5fe96719b74e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376096/normal_60065f474057b.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/b20bc6e0f.pdfIn PDF document text
    • http://dithetsen.xyz/20113792265xpchy.pdfIn PDF document text
    • http://erkutungotu.com/what_are_the_basic_tenets_of_feminist_criticismxxbby.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419193/normal_5fffbcd838251.pdfIn PDF document text
    • http://zoomita.space/226777099845si7v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413735/normal_5fcf57ef0ef24.pdfIn PDF document text
    • https://gojamomajaso.weebly.com/uploads/1/3/4/6/134616238/2927644.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/bejikefowu/construction_bid_templates.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_off0000d29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29F 5900 bytes
SHA-256: cf12e37bf58836a0f64bf20a8773414d51ea517614efe05d723f0e9299d474b8
font_01_sfnt_off0000e6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B7 10804 bytes
SHA-256: 28ab384ac1d1fbb8dc64bef0004c826c0618e4a738acfad04cb3e9380650ab79

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