Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8c1466745069cc…

MALICIOUS

PDF

67.7 KB Created: 2020-12-02 18:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b7493937fa973107917a1e9f83ac1666 SHA-1: 26551129728824de30848e5f6b7fafbf81779b12 SHA-256: 6d8c1466745069cc3f18891c15d4a4260eb5686904cb7497bc50e0c35d94e446
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/aws?utm_term=appointment+letter+sample+format+in+one+page PDF link annotation
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/3770932.pdfIn PDF document text
    • https://ruzunaxatan.weebly.com/uploads/1/3/4/3/134340268/nusuxopigabibem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467017/normal_5fa913b180196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f87582290299.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/simozik.pdfIn PDF document text
    • https://xilasofuvi.weebly.com/uploads/1/3/4/6/134651230/lugot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_5fb35c4c5ff34.pdfIn PDF document text
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/8198993.pdfIn PDF document text
    • https://reluxepeguru.weebly.com/uploads/1/3/4/3/134363030/259572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc169f3e2fce462bc8f8ca6/t/5fc3330fe18c5c478e63a17c/1606628112294/dye_dm7_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee4718e72e5fdb9b83cd/1606282823946/75972746104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647d9276-0c7b-4ba4-bf42-67f71880b494/10446447043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f688d808-afeb-47c2-a64e-f3de7bfce0de/cat_in_the_hat_rhyming_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4515e7ec-81e8-4522-8543-71f927252cb1/21640811486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0171b105-5fff-4211-abd8-c9446d39c6ef/hco3_bicarbonate_lewis_structure.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_off0000cc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC08 5212 bytes
SHA-256: b713657aa22566fc758f1f94e9fe11d6bbda8e5f46ec0daf50cebb8d2f7a063f
font_01_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 10480 bytes
SHA-256: 50b23b2410a348e34e3020060ea00c2bc0ebb215010531778dbafa7b7ebf78f7

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