Malicious PDF — malware analysis report

Static analysis result for SHA-256 551de457f282a075…

MALICIOUS

PDF

145.8 KB Created: 2021-03-22 11:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ccaf886411168f894a843822bf47a7a0 SHA-1: 9d766f0623e8a93626b6fd47532b69bcaf1f6159 SHA-256: 551de457f282a075d9c5747d6379aae90be09c4e462295c28d8abc939d293c6a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were extracted, the presence of many external links and the high risk score indicate a strong likelihood of malicious intent.

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://seumenha.ru/strik?utm_term=william+blake+paintings+images PDF link annotation
    • https://cdn.sqhk.co/tomubozes/qje5jeP/drive_simulator_game_download_apk.pdfIn PDF document text
    • https://givurubikuz.weebly.com/uploads/1/3/1/4/131482907/6a27aedf474d621.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/how_to_set_up_screen_mirroring_on_vizio_smart_tv.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/mr_coffee_12_cup_programmable_coffee_maker_manual.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/14813610086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464715/normal_601e6a72af12a.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/fid43JA/terminal_emulator_for_android_jack_palevich.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_602b5939d56de.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/ieugh3T/36662547583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459479/normal_603ebac2264b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_5fdb0a74346fc.pdfIn PDF document text
    • https://xefagopabori.weebly.com/uploads/1/3/1/3/131379938/2074601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_60209a04303c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412387/normal_5ff595859d472.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377678/normal_5ffe1ced231aa.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/erzMgf4/arcade1up_pacman_cocktail_table_with_stools.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42582535-4b08-492b-b074-69f840ed41cb/96222225369.pdfIn PDF document text
    • http://sakogabutal.onlinewebshop.net/bujolaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e93923-af26-4320-94da-5f10abd9381c/t-flight_hotas_one_ace_combat_7_xbox_one.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_off0001fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE09 5260 bytes
SHA-256: 5a53ab7ca3703a4b11d89ded10b608ee7b72a47604290dadf65fff7740b7227a
font_01_sfnt_off00020fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20FED 12360 bytes
SHA-256: f08b27a29a7f9663eaa834b0fe5519867d00b665f574d1bd0a24fb6fa3d4791e

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