Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a371e389b62af9…

MALICIOUS

PDF

176.4 KB Created: 2021-03-16 05:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1520e5a98817f2e827af932d25043451 SHA-1: 566ff0620bdcb01a8721138bc3098fd6fa1a88a4 SHA-256: 84a371e389b62af9eb6f03f3050ff066975673498f568b8609f5a2eda0c6561a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/wix?keyword=plainfield+elementary+school+plainfield+il
    • https://rorobobadewa.weebly.com/uploads/1/3/1/1/131164171/2521743.pdf
    • http://pedumerik.sportsontheweb.net/how_to_use_your_cricut_explore_air_2.pdf
    • https://nolelagisumo.weebly.com/uploads/1/3/4/1/134132353/2556351.pdf
    • https://walegizagoz.weebly.com/uploads/1/3/0/7/130775215/77f04ed3aa532.pdf
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/safobemoxiwet-biviwejoninovuw-giximi-tubok.pdf
    • http://paxezot.getenjoyment.net/do_all_audible_books_have_whispersync.pdf
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/1220846.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7828ee1f-a4e5-4c85-88b3-1326a2ed64a9/plant_high_school_football_playoff_schedule_mn.pdf
    • https://uploads.strikinglycdn.com/files/778f229f-c5e0-43ee-92f1-3adcc59efaf8/kifaxupivovonino.pdf
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_1ffad5a093d74543b9f6ea1b6b6ef074.pdf?index=true
    • http://dakerubigama.epizy.com/vugigep.pdf
    • http://nakepusigazu.epizy.com/xurobuxogifu.pdf
    • https://uploads.strikinglycdn.com/files/ede99f1a-b7d2-4d5f-928d-b65a8c1b0322/50945284861.pdf
    • https://uploads.strikinglycdn.com/files/c02bf7fa-c29f-4cd0-a320-d2b83f727c64/58292359313.pdf
    • http://kilarosine.atwebpages.com/75779968536.pdf
    • https://uploads.strikinglycdn.com/files/d67afe83-810b-46c2-9245-17aec4f5af08/sutofixewovawafidedowinok.pdf
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_a9042042bbe549f68d8f3879b9cce7d0.pdf?index=true
    • http://xaligapuk.epizy.com/ipcc_climate_change_report_2018.pdf
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_940127b35330467cbfaed0853d757aeb.pdf?index=true
    • http://gevekesudizare.epizy.com/envelope_system_spreadsheet.pdf
    • https://uploads.strikinglycdn.com/files/5d106535-54cb-4c60-a9e7-c647e2f6ba96/poxopofedutamawob.pdf
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_885b56e0680448108256990edc681b16.pdf?index=true
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_38ce9629d8a445b1a0150eec89a96631.pdf?index=true
    • 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_off00027bfb.bin
49350e42fb32fb5cfe37a58eeb14ea3a74cbee537102a04c6b5105fcdb012168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BFB 5496 bytes
font_01_sfnt_off00028e91.bin
53c8b7628f6cb378279c702900f698ae8b05733d800747c1ca2bbf710c9d0b85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28E91 11116 bytes

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