Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb208421c730140b…

MALICIOUS

PDF

87.8 KB Created: 2021-03-02 04:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ca5d3082fbd1e2271f7bc98f3ed47b91 SHA-1: 10bebe44d3249ae6dcff60a210e743d1a7c6f399 SHA-256: fb208421c730140b27b167bc65e5f3d1a09614e2afe7df9d29078211262294ea
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 as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The presence of external URIs and the 'link farm' heuristic indicate the primary goal is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=how+much+are+32+inch+tvs+at+walmart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417405/normal_603c4a5cc6963.pdfIn PDF document text
    • http://affilateapp.online/what_does_a_trustee_do_on_a_boardda1ct.pdfIn PDF document text
    • http://duxolaw.22web.org/maths_worksheet_for_class_2_download.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/42476297469.pdfIn PDF document text
    • http://trokot-roznica.xyz/xokofifabpi6i4.pdfIn PDF document text
    • https://cdn.sqhk.co/noretokujazo/hghhoa1/migowefagokafawe.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/fgjhije/98159036905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457561/normal_5ff67e8b8fb49.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/jbgg55Y/infinity_loop_game_level_61.pdfIn PDF document text
    • https://cdn.sqhk.co/lewonuvaxu/ojaqibF/47992228678.pdfIn PDF document text
    • http://kakasusalulul.iblogger.org/how_to_use_avon_bath_oil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzuvulas.epizy.com/44648058508.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001037a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 5448 bytes
SHA-256: f95fce9ad195084b082ab628c61ad368c0d39262c572b991067bc8db780c447d
font_01_sfnt_off000115e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E9 11728 bytes
SHA-256: 5623b456209634aa088ab67038a455dfb474f02507a37e38f601cedc57f14140
font_02_sfnt_off00013dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC5 16084 bytes
SHA-256: 12e1bdea5fc73f205daff8bbc4573b4c6e5ba94205cf5b3440f65e61b625f0f0

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