Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e1eed6b94a05a2…

MALICIOUS

PDF

91.8 KB Created: 2021-02-13 07:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 787b08aed928ad64ec3b6a3388e2a0fb SHA-1: b59ba193435849805dadd33074c30da0b818776d SHA-256: f2e1eed6b94a05a246d79d32f48ad8345beb7db8a961fa28187cb1c0790fe878
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 trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document. No scripts were extracted, but the PDF structure and URL patterns strongly indicate a phishing or malware distribution attempt.

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://baarspo.ru/123?utm_term=ffxiv+guide+2017+pdf PDF link annotation
    • https://cdn.sqhk.co/jisepozidis/9vWpQyG/nelson_business_textbook_grade_10.pdfIn PDF document text
    • https://cdn.sqhk.co/ludukuni/lkhahcl/chocolaterie_jean_trogneux_brigitte_macron.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/hazYggY/paporatuwut.pdfIn PDF document text
    • http://linza.media/cyanogenmod_update_zip_file9k8i7.pdfIn PDF document text
    • http://all-casino.xyz/raketesewemukinusires2vsm.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/jiBiggh/legends_football_league_best_players.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_601cdeb82022f.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/TijfjfM/sanderson_sisters_hocus_pocus_witches_names.pdfIn PDF document text
    • http://umdtheatre.ru/333679467365pybh.pdfIn PDF document text
    • http://eduha.online/mobegovolewiwanutekirudpq2be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414494/normal_6007414632c00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462075/normal_5fd8f275a73a7.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/jbjbNgi/rexebi.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/h9Ib7jh/spinning_tops_traditional_game.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/panokojol/bike_speed_sensor_android.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/accentuate_the_positive_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/audit_risk_questions_and_answers_acca.pdfIn PDF document text
    • http://borosiker.rf.gd/parental_care_in_birds.pdfIn PDF document text
    • http://pivunovukemo.epizy.com/28672599485.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E3 5184 bytes
SHA-256: 37416022b229dff4735f0e70073ec084164f12fc5dcb4ed9ca621cf2f2f758da
font_01_sfnt_off000126c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C5 11124 bytes
SHA-256: e5734572e1f7ad5d10099a3998d6ebcf356903a3590d6dfcf921fee4112cecd9
font_02_sfnt_off00014cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF8 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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