Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa92d462cd57e2dc…

MALICIOUS

PDF

67.0 KB Created: 2020-11-16 23:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a48085cb8e40276216994e02afef5bc1 SHA-1: d4ba9e327417c522f3ad44d2a2367b14670417de SHA-256: fa92d462cd57e2dc6c8a6062f6783c68f830a17b7f1bf5bde88ff83bd5dd7876
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users through deceptive content, likely related to software keygens or similar lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffnew.ru/strik?utm_term=digital+insanity+keygen+password PDF link annotation
    • https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/jevomefagaku.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/fodov-vineponuje-bufasisubejeni.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/5315003.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/tasawapadupaxasixep.pdfIn PDF document text
    • https://rusekawavupor.weebly.com/uploads/1/3/4/0/134096427/balevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5f90880c96cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5f9e2e19110f1.pdfIn PDF document text
    • https://rutobugexamaxip.weebly.com/uploads/1/3/4/5/134508198/zebununetamomivu.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/ec8319fc0ae6d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f9126a538a13.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/tevikaxubomubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f8819363d6a4.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/zafaronivaj/ejemplo_de_informe_de_auditoria_interna_de_una_empresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e83f2b33-a4e2-409c-a592-6736c65d0101/libejedosafuwolokejof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc73821-0d33-4622-ae58-304983fc2daa/dungeons_and_dragons_5th_edition_dungeon_masters_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_off0000c885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC885 5384 bytes
SHA-256: 5e2f073b13fca67fe7dd9b6a60da1eed0b2bf594c9ceb7c92d3e2a45ce482a65
font_01_sfnt_off0000db07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 10516 bytes
SHA-256: 502876e4b65f94fd792cd2fef7ff0f52e234bca8ea4ff4c933ed1388dc0d4320

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