Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c908bc10c213cc…

MALICIOUS

PDF

123.9 KB Created: 2020-12-28 04:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f6fcd25ee0333e6456e13b5c7b5821f3 SHA-1: c2ad7cd8a5d98fcc8da3a03e2aeacea65dff0412 SHA-256: 32c908bc10c213ccd8e3f1c8bb417350210695a13765811827ef337d1a85a7fd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one, 'https://traffset.ru/strik?utm_term=wehrmacht+vs+ss+scene+in+ww2', appearing to be part of a phishing or malware distribution chain. The PDF's structure and the presence of external URIs suggest it is designed to lure users to malicious sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=wehrmacht+vs+ss+scene+in+ww2 PDF link annotation
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/747c620262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f88686b85971.pdfIn PDF document text
    • https://ruwalabipuges.weebly.com/uploads/1/3/4/4/134465281/bozov-zebonuterir-powinokoleg.pdfIn PDF document text
    • https://noparageselex.weebly.com/uploads/1/3/1/8/131856757/1388020.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/9331796.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/917472669f0ca.pdfIn PDF document text
    • https://banetopebored.weebly.com/uploads/1/3/4/8/134874573/zivabati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472182/normal_5fd17922139b8.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/najipavez/2478156902.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/30651545095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4d92a6-8016-4363-8ed4-275bd7dbdd7f/48062447650.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_off0001a930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A930 5304 bytes
SHA-256: 633c6e6bf6828b8883ce5ec3e6a05b57b7cfb71d86036c6a928a521992483852
font_01_sfnt_off0001bb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB26 12440 bytes
SHA-256: 4d48157d285ee4cc39a62ff96e4ee96c5bccca72efc6969b50968c4ae26179d3

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