Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98e4c2c29cace4e…

MALICIOUS

PDF

74.5 KB Created: 2021-02-28 12:28:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 932e720c41f2207a3db59828f5acfcfc SHA-1: dffe43db7b5439b5d288c32622b2184420c8650d SHA-256: b98e4c2c29cace4ebdc91c0a566eff170d568ccb6f1f2e145fbaa04b6e5a2886
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many pointing to disposable hosting or potentially malicious domains, suggesting it's part of a link farm designed to redirect users to harmful content. The document body, though heavily obfuscated, appears to contain keywords related to product searches, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/award?keyword=delonghi+ceramic+tower+heater+aldi PDF link annotation
    • https://gibitomenufe.weebly.com/uploads/1/3/4/0/134041720/tozazazavez.pdfIn PDF document text
    • http://ig-objectionform.com/tudavujesipunan86hdq.pdfIn PDF document text
    • http://iclod.tech/jamisouo5h.pdfIn PDF document text
    • https://duxegolukazokun.weebly.com/uploads/1/3/1/3/131398215/5a491bebdbafb5f.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/game_of_thrones_s8_download_reddit.pdfIn PDF document text
    • http://hurricane1.space/bitbucket_branch_as_zipc7nmc.pdfIn PDF document text
    • https://sisasava.weebly.com/uploads/1/3/0/7/130738988/5597da237fb.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/duzadenomerarine.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/4728098.pdfIn PDF document text
    • http://xozonline.ru/newlec_economy_7_water_heater_manualku0s1.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/d6a7405ced.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/3842589.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/cost_assumptions_are_reasonably_valid_within_the.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/41345798330.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/tivipugixibogos.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/descargar_whatsapp_plus_gratis_2019_apk.pdfIn PDF document text
    • http://jetotajasavesi.atwebpages.com/69156650337.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_off0000e601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE601 5264 bytes
SHA-256: fb144ab8ec2963b9aa7921681dc213d0e75a923c3ee3c72e9f813f2a57419cfb
font_01_sfnt_off0000f7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CE 10848 bytes
SHA-256: 311682d81a451006ed1d317078a99f5e0ee944163358bf181d435d89f065494d

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