Malicious PDF — malware analysis report

Static analysis result for SHA-256 b794198ec20a13a9…

MALICIOUS

PDF

77.1 KB Created: 2021-03-30 07:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76b50a38a9cfbd75154074b3730a50a9 SHA-1: 6e8d99bbf04c02a362105e6d57e37212a34bba08 SHA-256: b794198ec20a13a9bbf722942e9d7467efc5a9ba945bc4e2baea29e0c0cb87cf
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users through deceptive content, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/award?keyword=brief+history+of+south+africa+pdf
    • http://vijevejumozugim.sportsontheweb.net/stewart_calculus_instructors_solution_manual.pdf
    • https://cdn.sqhk.co/vekazedivipi/cjggiha/97358365366.pdf
    • http://bowuvudofi.scienceontheweb.net/sejijegosijet.pdf
    • https://cdn-cms.f-static.net/uploads/4380214/normal_605bf38d39414.pdf
    • https://cdn.sqhk.co/dixejetafap/4gggcgi/tutuapp_new_version_ios.pdf
    • https://cdn-cms.f-static.net/uploads/4489834/normal_5fd29f58cec95.pdf
    • https://cdn-cms.f-static.net/uploads/4454988/normal_604d6d5f77b50.pdf
    • https://static.s123-cdn-static.com/uploads/4481072/normal_5fee54949b379.pdf
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fee056ca68a2.pdf
    • http://kusafomidufe.mywebcommunity.org/zadojifuxuboxixedopo.pdf
    • https://cdn-cms.f-static.net/uploads/4380223/normal_6012b08446abf.pdf
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5ff3075c758c0.pdf
    • http://sozaxesugoj.mywebcommunity.org/bumixulugewekurowisosase.pdf
    • http://basidugom.mygamesonline.org/printable_weekly_calendar_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gomugugagaf.onlinewebshop.net/tovuxunane.pdf
    • https://uploads.strikinglycdn.com/files/f6314bc5-56a2-4abc-b962-7db18ab5d99a/what_does_day_mean_in_hebrew.pdf
    • https://uploads.strikinglycdn.com/files/b0de4908-4f0e-44ca-9d27-6d781ff0d961/toriraxelabi.pdf
    • http://zerowegujij.onlinewebshop.net/how_to_search_within_a_on_mac.pdf
    • https://uploads.strikinglycdn.com/files/04f2b48d-b9ff-42cd-91b1-b1aec11df5e0/honda_shadow_sabre_1100_solo_seat.pdf
    • https://uploads.strikinglycdn.com/files/162981f4-5fe0-44b6-91ef-b045f2db67e8/what_to_do_if_3_day_potty_training_doesnt_work.pdf
    • https://uploads.strikinglycdn.com/files/cef3c287-9c95-4eb1-a9df-de84920a901e/41143931078.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a8.bin
8b31b035dfdd59a45d63e5c49e893fe9fb7f0222590f8646f9b6af146aed7a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 5360 bytes
font_01_sfnt_off000104eb.bin
bbc5e46d55d4dce15e7f75f05efb595da6df66ed9840baa22245fc3b16f4c996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104EB 10032 bytes

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