Malicious PDF — malware analysis report

Static analysis result for SHA-256 225b514d572aa71a…

MALICIOUS

PDF

69.2 KB Created: 2020-11-14 08:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9dbcd51063441659ae1d5477099b3d79 SHA-1: 88412ae6785645b5579c1c30715930e4a9168c93 SHA-256: 225b514d572aa71aa1f0c1f01616c078ea2b5f476628f34c2a1b64c928bc6cad
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one pointing to 'trafftec.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting.

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://trafftec.ru/123?utm_term=milwaukee+2426-20+review PDF link annotation
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/7c29863.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/6565169.pdfIn PDF document text
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/luxajurogunifigor.pdfIn PDF document text
    • https://mabamakozipapap.weebly.com/uploads/1/3/4/3/134315796/4983269.pdfIn PDF document text
    • https://xadudimomo.weebly.com/uploads/1/3/4/1/134131791/matopix.pdfIn PDF document text
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/493898.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/278805.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/datogaxuvez.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/2796375.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4545d7f9-8aa3-49e6-8512-a4a2f1b5688e/kupumejevinatumilodu.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/kodojuzovutexireguzodeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9cea0bb-0a26-4e5b-a521-2451820c1093/66922267350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7894022e-da49-403a-a138-32960d6416db/commodity_trading_manual_1998.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/amplificateur_inverseur_et_non_inverseur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49db5c1a-2645-4af4-976e-6731f26f9810/97044965620.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/19107057376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172af5bb-a4e3-4f41-831e-74bb60660256/sofuwavatemuw.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_off0000d1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E5 5268 bytes
SHA-256: fc29ffb6b8262e7c7ec386005da770b9c1d2db18a8752a5447d6bf33f5438b7c
font_01_sfnt_off0000e412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 10516 bytes
SHA-256: 104995a6a515b5203c910a0a16a480fbfeee2efd704ee4eb704b58041023b42d

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