Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f913ad2f50faf67…

MALICIOUS

PDF

68.9 KB Created: 2021-03-22 18:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 94ddc2da2e9023479551fc6b0f82983d SHA-1: 243232a939ac22fb101995228d87fe31c4036291 SHA-256: 2f913ad2f50faf67c9e3cf69bd9c0033be987eecbed7985488db8a2115a16469
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags this behavior, and the presence of external URIs further supports the phishing lure.

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://zajinet.ru/award?keyword=centre+of+mass+of+solid+hemisphere+pdf PDF link annotation
    • https://bubijusafas.weebly.com/uploads/1/3/5/9/135994311/ravedi.pdfIn PDF document text
    • https://monoxute.weebly.com/uploads/1/3/6/0/136051008/tagowulepon-geveteditarite-muguvad-turexeriliz.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/iggichj/samuzosisi.pdfIn PDF document text
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/3342060.pdfIn PDF document text
    • https://fakodide.weebly.com/uploads/1/3/0/8/130874451/4413897.pdfIn PDF document text
    • http://pokinusuvato.getenjoyment.net/11845204438.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/jupikuba.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/geb9hgO/blue_cross_blue_shield_ma_find_a_doctor.pdfIn PDF document text
    • https://cdn.sqhk.co/vomuvojovi/hd6jjia/puvukulemasenemaron.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/free_printable_weekly_planner_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/lyibhb2/supodiwira.pdfIn PDF document text
    • https://pawimugonuri.weebly.com/uploads/1/3/4/8/134882006/36ae18487.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mofomunor.rf.gd/as_time_goes_by_piano_sheet.pdfIn PDF document text
    • http://goduzidexemave.epizy.com/java_gameloft_car_games.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/input_file_accept.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/koxaxaxoginilisesetuloneg.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/70881459371.pdfIn PDF document text
    • http://xigesema.epizy.com/brawlhalla_cross_platform_pc_ps4.pdfIn PDF document text
    • http://gojejamajutemus.epizy.com/wojizalukanifixalik.pdfIn PDF document text
    • http://lorenivi.rf.gd/anong_kaibahan_ng_tabloid_at_broadsheet.pdfIn PDF document text
    • http://wosolebaxuwutux.rf.gd/coldplay_clocks_piano_sheet_music_free_printable.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_off0000d0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 5188 bytes
SHA-256: a4c3bc6ed912af04e01b7a381c41a86fe1ef3e0b870a59315c889b310d04e350
font_01_sfnt_off0000e21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21E 10572 bytes
SHA-256: b45fc0e53db942df12e96d519998d98f9020d598f000c9464b142be25975bdbb

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