Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb323d09b432769b…

MALICIOUS

PDF

84.5 KB Created: 2021-03-23 00:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 507679f629fe7503c9ed20826e353ab9 SHA-1: 5779e51bf3ab6d4c736248ae602460b99c2b0281 SHA-256: cb323d09b432769b629245ae3017c40de9476440931a65d0e0ae5854e3c44e9b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'bologen.ru', which is likely a malicious domain used to host phishing content or download further payloads. The document body, though heavily obfuscated, suggests a lure related to online courses, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=basic+computer+science+online+courses+stanford
    • http://naturelofo.mypressonline.com/activity_based_costing_abc.pdf
    • http://nakekizedexu.getenjoyment.net/lewis_acid_and_base_theory.pdf
    • http://revodegasiger.sportsontheweb.net/dizudonaboxobo.pdf
    • http://komaxinatobofe.medianewsonline.com/dark_knight_script_joker_interrogation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/521f5b61-fa7d-4a72-8c6d-0dfbff64b6a9/taco_bell_chicken_power_bowl_nutrition_info.pdf
    • https://uploads.strikinglycdn.com/files/7fb13574-b103-4a4e-9a0c-5c6050c11d42/pomixetemisudezukew.pdf
    • https://uploads.strikinglycdn.com/files/01f9f184-408c-453c-93ac-c8936b427ff6/how_to_pair_rca_universal_remote_to_sony_tv.pdf
    • https://s3.amazonaws.com/wukevirenesu/43760671343.pdf
    • https://uploads.strikinglycdn.com/files/602e9280-f289-4b29-b08c-fbdff3492e1f/wirituw.pdf
    • http://kunerev.epizy.com/king_arthur_flour_cafe_nutritional_information.pdf
    • https://uploads.strikinglycdn.com/files/ca2f0fea-09fa-4409-944b-2af81db703d9/25375721197.pdf
    • https://uploads.strikinglycdn.com/files/40ca4270-cdcd-4063-86c5-565ef1964cc2/moziseji.pdf
    • https://uploads.strikinglycdn.com/files/4a406e7e-9283-4fa5-8f00-013660fb8afe/cuisinart_dlc-7e_work_bowl.pdf
    • https://uploads.strikinglycdn.com/files/64a6ba30-fd5c-4043-bd7c-7c13a20069fe/rovavurozijexajadisajo.pdf
    • https://uploads.strikinglycdn.com/files/86359fec-c3f0-4500-ad2e-7a1c8118cf46/minecraft_le_guide_redstone.pdf
    • https://s3.amazonaws.com/wutogugej/85467937243.pdf
    • http://wotanuxofewaru.rf.gd/pdf_to_word_automator.pdf
    • https://uploads.strikinglycdn.com/files/5fa93493-4d19-4172-8cc0-7904404c5e04/como_ser_un_buen_lider_de_nios.pdf
    • https://uploads.strikinglycdn.com/files/514d0ddc-6fa3-4902-8ce2-c54d06363da7/45799462827.pdf
    • http://zobowubi.epizy.com/56759052511.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_off00010a60.bin
a5a169249290a0d3d4622975b318ccc0d750e7846fba2e5c5f3fa328824bcb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A60 5348 bytes
font_01_sfnt_off00011c76.bin
3cef95a7010868c6dd48d3a950c66392ce7c85eb068d1906623725681e06c321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 11436 bytes

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