Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae303c848369501…

MALICIOUS

PDF

86.0 KB Created: 2021-03-20 18:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1805ece42ffd99a856e3b73efc21bfb SHA-1: e709fa43955da14dbd9ec88109dd35d0c7c47053 SHA-256: 8ae303c848369501a95ca479b4371f3ba1a8b1d92d574eb22a30b16ec540a7f3
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'dafemum.ru', which is likely used to host malicious content or redirect users to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Cessna 172 cockpit wallpaper'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=cessna+172+cockpit+wallpaper
    • https://static.s123-cdn-static.com/uploads/4454054/normal_5ffe727560282.pdf
    • http://zotikarida.medianewsonline.com/molusobepule.pdf
    • http://dixunawizodel.iblogger.org/root_cause_failure_analysis_report_format.pdf
    • http://kusafomidufe.mywebcommunity.org/kezopipuduwujipuvu.pdf
    • http://miribut.mywebcommunity.org/balance_sheet_ratio_analysis.pdf
    • http://ridovise.sportsontheweb.net/articulos_de_la_constitucion_mexicana_que_hablan_de_la_familia.pdf
    • https://cdn-cms.f-static.net/uploads/4387050/normal_604459204997a.pdf
    • http://gixibuni.22web.org/after_dark_murakami.pdf
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5fcbd47b26254.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bukaduxanob.epizy.com/53016340295.pdf
    • https://uploads.strikinglycdn.com/files/55051923-3c06-43e4-b3be-299322f38e9c/your_love_never_fails_chords_piano.pdf
    • https://s3.amazonaws.com/kelukakeb/16125517964.pdf
    • http://posugez.epizy.com/hazarduari_tour_guide.pdf
    • https://s3.amazonaws.com/rufonali/rural_sociology_definition.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/corporate_sustainability_reporting.pdf
    • http://mesibes.rf.gd/pumeji.pdf
    • https://s3.amazonaws.com/najubu/angular_6_form_control_value_changes.pdf
    • https://s3.amazonaws.com/jovekus/desktop_support_engineer_job_description.pdf
    • https://uploads.strikinglycdn.com/files/cef61920-a198-44e1-b41e-d3cbcc6a6d1c/53982675871.pdf
    • https://uploads.strikinglycdn.com/files/0e50bcdb-bb91-4c70-8158-493d131169e0/how_do_you_write_a_short_film_script.pdf
    • https://uploads.strikinglycdn.com/files/a04ea0b8-e8eb-46a0-93da-4ed2ee5c1dc9/taparekanekalo.pdf
    • https://uploads.strikinglycdn.com/files/f9f60d08-a99c-4134-aef0-b188f9f2cc30/najijuxebixarevuzaxaxepu.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_off00011365.bin
b7b9f7db4ca9003f74a1f12d4decae203b68a3fca093a2b3d1b837e58dc48caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11365 5252 bytes
font_01_sfnt_off00012571.bin
0ac627053da9d737b5a7819985b8a93499fae42c7b6b9eaddfbeaf51cd3df1c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12571 11128 bytes

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