Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1720748ed664ac1…

MALICIOUS

PDF

71.1 KB Created: 2021-02-17 10:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ae40289af2898206d1b319c2c50fc80b SHA-1: 358d4d0f138cbfbcc52d0bc42a4e7dc7d9951c43 SHA-256: f1720748ed664ac162b9d4960f8315de2dd112bd56e637525947e1bdc8d12b80
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 as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, suggesting it functions as a link farm or phishing lure. The presence of external URIs and a link farm heuristic points towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://bologen.ru/123?utm_term=imdb+the+green+mile+trailer PDF link annotation
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/ratovarene-judixi-deriga-mavana.pdfIn PDF document text
    • http://zalavsky.ru/nuwukejorajokxq9nz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481422/normal_601a758e9ba58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366000/normal_5ff8f71da1872.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/03hjPge/dowidoxolofuke.pdfIn PDF document text
    • http://reduslimitalia-official.website/officer_buckle_and_gloria_booklhigk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_5fd1356031d34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489255/normal_5fe7a0e9d3ff9.pdfIn PDF document text
    • https://rusofejez.weebly.com/uploads/1/3/1/8/131856127/vapevuvejimewuzaz.pdfIn PDF document text
    • http://bupro.asia/vuronalopvqija.pdfIn PDF document text
    • https://kapejipe.weebly.com/uploads/1/3/1/0/131070538/9723f3eca98e44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 5140 bytes
SHA-256: 50c6a7c7fcd2d5606c7c4c0a5d6a6045b711914297a7bcfc1927958f60c05e59
font_01_sfnt_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 10488 bytes
SHA-256: 035a2cf7dac9104f032e8fa71cf5ee42bd7b06ede40797f4308c9ef22cb01286

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