Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5ea40b2c161c65…

MALICIOUS

PDF

67.1 KB Created: 2021-02-20 10:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 88063f450ee3817c44f899ab1b9dc859 SHA-1: d0962a561790040dddfd2695e58d01caf9e1d866 SHA-256: 2d5ea40b2c161c658a9d6c8f17e861487f6133c8482d0e8855582679795dd7dd
126 Risk Score

Malware Insights

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

This PDF sample was flagged by multiple heuristics and an ML classifier as malicious. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure indicate it's designed to redirect users to potentially harmful external content, likely for credential harvesting or further malware delivery.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/123?utm_term=2014+honda+cr+v+lx+owners+manual PDF link annotation
    • https://dumugukof.weebly.com/uploads/1/3/4/6/134647937/wokon.pdfIn PDF document text
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/8399304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487186/normal_6015029654cdf.pdfIn PDF document text
    • http://tubipiguposazi.22web.org/60488084724.pdfIn PDF document text
    • https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/2557898.pdfIn PDF document text
    • http://dilurijarejo.22web.org/82171459059.pdfIn PDF document text
    • https://mebijanuwirat.weebly.com/uploads/1/3/4/0/134042853/a7ca2bf7e013984.pdfIn PDF document text
    • http://interbankdigital.com/10941416815kwzf7.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/zumezeviwakiz/83081711812.pdfIn PDF document text
    • http://zopefunexot.epizy.com/63551339718.pdfIn PDF document text
    • http://puxetixunelotaz.epizy.com/introductory_speech_of_a_travel_guide.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_off0000c66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66E 5720 bytes
SHA-256: 0f147bffe69dccf3e36840f0ca9cb8e60d91d9624a000dfaf271c29e36315034
font_01_sfnt_off0000d9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D8 11140 bytes
SHA-256: 591055396cf3dd0eae40ae33cea85a5d99a1a8acca901c8d4ac0b47ce840ec8d

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