Malicious PDF — malware analysis report

Static analysis result for SHA-256 0455925753c85729…

MALICIOUS

PDF

65.1 KB Created: 2020-12-17 22:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: cad7c9846dcfed37cc3b24c797ec1cf9 SHA-1: 38e48c7168089482b492681f920a003ddb77afcf SHA-256: 0455925753c85729f0d47c837183640db9fb5eee19b2c1810a921c55d4a6ff6e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. Another critical heuristic identified a PDF link farm, suggesting a coordinated effort to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://ggtraff.ru/strik?utm_term=urcna+church+order In PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/pimutuxibakajina.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/5fbce344be7cfc36344e8aaf/t/5fbe0d117acac6192a87df2d/1606290708916/10246382143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b32fa68-fe3d-4dbf-a983-e49ab411c08a/1682842429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e598f377-250f-40b6-9b83-7e55971f353f/11067800860.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/rescind_meaning_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0730ad38-97ed-4b06-9b44-abbc4664b125/nuwunidiwamazizirudomaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/bostitch_manual_stapler.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/glory_road_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/16073807741.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_off0000c4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A1 4808 bytes
SHA-256: ae2f98313640494f42cc4b1f2e6651c58dbb951383c295065027ec769eb2f233
font_01_sfnt_off0000d4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F3 10424 bytes
SHA-256: 4778660168cf932be334a0da483437708b40defea63bc2e0e5418494e2c877fb

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