Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e66032d3f468b51…

MALICIOUS

PDF

67.0 KB Created: 2020-12-14 04:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1d76c7502f46dda52d07aeed32eeb74d SHA-1: 163aac46c61404421bc3d3c961ede72e1428f7df SHA-256: 0e66032d3f468b510503e28722b06481a153a96b4239a5dbb62d95fe5ecd878e
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with several identified as malicious redirectors or part of a link farm. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious nature by appearing as a workshop manual. The ClamAV detection and ML classifier further support its malicious classification, indicating it likely serves as a lure for phishing or 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=mazda+6+workshop+manual+2015 In PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/5887f1cb1.pdfIn PDF document text
    • https://dawupewutusod.weebly.com/uploads/1/3/4/8/134879821/zowabugomofija_vabejuzudif_mesivoxuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470979/normal_5fb99751c416b.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/turufukesovu-kojetebadokon-mavemit-tegevewuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414677/normal_5fa20b76cced0.pdfIn PDF document text
    • https://mesobesin.weebly.com/uploads/1/3/4/5/134590010/4d580067a84e768.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/db2782d3-dc0a-4854-8f8d-bdd48e8b8c39/19347646503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd55fbf-3755-46b1-a89d-bd22b7248700/41301592187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d3474c-c8df-4567-b67b-029fbce4386c/53245089287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b362b24-b8fe-41bc-b3c3-d21643632f9e/xuxalukikiwexifetimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef54720-223e-49bc-af1d-3f8fce65bef5/vesasafexurijikojawati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a4ab4a-d00e-4729-aa44-ea4e9df5602b/vazadabenebudunarur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf98dbf-24fe-4518-8464-98def0bf54a5/fegemisosike.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_off0000c73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73C 6016 bytes
SHA-256: 729031d345d0b55e460ea6d8218b95d7ed30b5e26c8c3847d16ee6ec91d5ec42
font_01_sfnt_off0000dbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBB 10404 bytes
SHA-256: 021d9c5e1c27a7bd55e1b3fbd028a2e86b59c1beb92d1283604230e1a08b2519

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