Malicious PDF — malware analysis report

Static analysis result for SHA-256 9746e5b946cacb8f…

MALICIOUS

PDF

74.3 KB Created: 2021-03-03 18:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8c0d576104acf373049e16d1d4ae4adb SHA-1: 347c2ef62ac3cb13b4f9b17f8195ba3bf2ffe78b SHA-256: 9746e5b946cacb8ff8741665dda7ecae39deed09a8cf6528e537a4e0e9e40fb6
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

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://jumiwimov.ru/strik?utm_term=dunkin+donuts+glazed+donut+nutrition PDF link annotation
    • http://pribor-poverka.site/dizajuwagusukonutagfixav.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/zazawibibivubawin.pdfIn PDF document text
    • http://scarcebook.com/kofojamexua6m3h.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/Cgchfhb/mini_games_to_play_on_zoom.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/a_confederacy_of_dunces.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/74586289969.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/rukotelozolulezez.pdfIn PDF document text
    • https://cdn.sqhk.co/niminililez/eROHDjg/7516000372.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/2006_honda_odyssey_lx_for_sale.pdfIn PDF document text
    • https://sagupegijugix.weebly.com/uploads/1/3/4/4/134443219/mebibigifiseb_lesewelikorive.pdfIn PDF document text
    • http://gta-msk.ru/quotes_sun_tzu_leadership6hcg7.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/RY1WfWA/larry_h_miller_movie_theater_centerville_utah.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/Shdrjcm/nfl_standings_wild_card.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/zjaE66E/totally_accurate_battle_simulator_game_preview.pdfIn PDF document text
    • https://gozobamo.weebly.com/uploads/1/3/4/7/134714837/4713a219c8.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/lumixi/80828279290.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_off0000e5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FF 5108 bytes
SHA-256: 90f4c3cebfb41ba068e5b985cb9697c51b62a4d68243e9108ed62f80271ec183
font_01_sfnt_off0000f77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77D 10596 bytes
SHA-256: 456d3deb92d4cd43f813b8e5f619191842ded2b16b4306e7894a533fdca77ef8

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