Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2252c13cf3496f0…

MALICIOUS

PDF

74.7 KB Created: 2021-02-21 05:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1187497dd280766b7f7443cc40427863 SHA-1: 0f077db89ff1097081c63d35077eb848b573d7f0 SHA-256: d2252c13cf3496f0a99f87d29247fe2bd9d55c34862bd0c96b715fc255ec2ad4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though obfuscated, contains keywords related to search terms, likely intended to deceive users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/strik?utm_term=facebook+marketplace+categories+calgary+cars PDF link annotation
    • https://noselarinagebep.weebly.com/uploads/1/3/6/0/136051947/020465a23ece.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/jexijukamezefi_sowegugozidi_libubaxufe_lobekaposupi.pdfIn PDF document text
    • https://zugufanebuloko.weebly.com/uploads/1/3/4/0/134016669/6944994.pdfIn PDF document text
    • http://astrohelp.space/gonusipininuyf6on.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485813/normal_5fd675abd9ab6.pdfIn PDF document text
    • http://mp4.design/fallout_1_guide_gamefaqs9gfi3.pdfIn PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/mozexewofad-fikuwipaba.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/sobukepku9se.pdfIn PDF document text
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/2736ce1.pdfIn PDF document text
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/4454b6915af82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farokof/samsung_55_inch_qled_4k_smart_tv_-_55q7fna_2018.pdfIn PDF document text
    • http://girupesoja.rf.gd/javuvusaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/bhairava_south_movie_background_music.pdfIn PDF document text
    • http://xasives.rf.gd/sirekenejetusof.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/guideline_for_excipient_compatibility_study.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_off0000e4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C7 5512 bytes
SHA-256: c22821f32d304cd35a70fe36e380b8ae950134e75beec63414047b730aca12f7
font_01_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 11324 bytes
SHA-256: a406d0f326ae1521d539f0525a3f17f423b45404d042acff5e95015865931882

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