Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e564374615d13a…

MALICIOUS

PDF

72.4 KB Created: 2021-03-01 07:35:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 01a0aa971d5cdee6a055ae8a06342bf4 SHA-1: 6e4aa6b746f3427701c3e4dc87aee20644c9b8c2 SHA-256: e4e564374615d13ac3b6dd03452a0ff53284de8755485012b83be4b6a9f8b6ea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, with the primary one being `https://jacksth.ru/award?keyword=can+you+buy+a+tiny+house+on+amazon`, suggesting a lure to a malicious site. The PDF structure and embedded links indicate it functions as a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=can+you+buy+a+tiny+house+on+amazon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452853/normal_5fd1f4848d032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_600e35db7d61b.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/jbJiZhb/free_wolf_wallpapers_for_cell_phones.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/HdidTzY/papamalisazuko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500665/normal_5fe024871f3aa.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/72878870714.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489834/normal_5fe3eb4cc7d80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_6013da559bc53.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/what_is_health_economics_and_policy.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/QFihvgh/kanenubuvazazifudaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rukosivujuxu.atwebpages.com/veroradodaramuk.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/40394332874.pdfIn PDF document text
    • http://lelupiborojez.epizy.com/wakexuruletosu.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/how_to_play_ukulele_a_complete_guide_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/hd_video_background_loops_free.pdfIn PDF document text
    • http://gebejofokim.rf.gd/how_to_make_knotted_bracelets_step_by_step.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_off0000dfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBF 4996 bytes
SHA-256: 9fa83ee850ae31a7ac0a45602efb2aecf8bc203df445c39e8401d6162b952606
font_01_sfnt_off0000f0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A2 10560 bytes
SHA-256: 10ed453e65b6a761fa7e3605741ea9ac022899b1b224cb17bb45081accbd4f3c

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