Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fe13c142264373…

MALICIOUS

PDF

81.1 KB Created: 2021-02-16 08:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 2871efe21a7131ab75635de5ad3d6787 SHA-1: 3da929ac93f60a494568a3237dbf6f8c0277fe2a SHA-256: f4fe13c14226437371253a03e5ff51e37ad403ad3da1e2d0df23eed860fbc9b6
216 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious content, such as the URL 'http://fineagencyy.com/is_gdp_a_good_measure_of_economic_growthncmur.pdf'. The document body, though heavily obfuscated, contains references to 'Full spanish dictionary pdf download' and 'wkhtmltopdf', suggesting a pretext for downloading a file. The presence of multiple external URIs and the PDF_SEO_LINK_FARM heuristic strongly indicate a phishing or malware distribution attempt.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://leonvi.ru/strik?utm_term=full+spanish+dictionary+pdf+download PDF link annotation
    • http://fineagencyy.com/is_gdp_a_good_measure_of_economic_growthncmur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_601aa1140d8e8.pdfIn PDF document text
    • http://larts.digital/botikikasawonulogudu6chmw.pdfIn PDF document text
    • https://mutikotamibe.weebly.com/uploads/1/3/0/8/130874320/1ff27cc1485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450511/normal_60154726c5a43.pdfIn PDF document text
    • http://tk-pobeda.site/adobe_indesign_keyboard_shortcuts_cheat_sheet3ij9b.pdfIn PDF document text
    • https://zakoponuzu.weebly.com/uploads/1/3/5/9/135992890/xasopaduxog.pdfIn PDF document text
    • https://rejobasagiletez.weebly.com/uploads/1/3/4/6/134642313/ranot_goxel_bifalamezuwomej_potov.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/4756858.pdfIn PDF document text
    • http://losmopaka.site/emulator_android_untuk_pc_paling_ringangf7xm.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/bidemewufa/65629486144.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/chumma_me_chyawanprash_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/95984003986.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/artificial_feeding.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/chocolate_bengali_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/convert_to_word_documents_free_online.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_off0000ffa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA5 5392 bytes
SHA-256: ee30ef0d32c9ecf8203497e2a33644a8b8ba1d023e21e00e36ad9f7f0d3c7166
font_01_sfnt_off00011211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11211 10876 bytes
SHA-256: d24ab9d7c03e411df708b1ddfe54941dd16e17447a160c7d3e09488f3c72ff5c

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