Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d44e5dae85bb53d…

MALICIOUS

PDF

66.8 KB Created: 2020-12-17 15:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a8360532f9daaee7afae17f09b4d7b53 SHA-1: 8c265f6ca6a74f4bfdfa9e69da700f4f53ea94a4 SHA-256: 8d44e5dae85bb53d0e408365672c2971c5416e8f8e4feab99e8c378f549e31d4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to download a game, likely a lure for malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, contains text related to downloading a game, reinforcing the phishing pretext.

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://trafffe.ru/strik?utm_term=download+wwe+2k+for+android+apk%252Bdata PDF link annotation
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdfIn PDF document text
    • https://zaduwemupate.weebly.com/uploads/1/3/4/4/134464980/giloje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483623/normal_5fca7ff66b748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5fa1b391bb035.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/bb78cb07-20ed-4bfa-a2eb-fd199687eb48/err_wij_20003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8100784a-a8b5-40ce-b74b-80c51e6d019c/multiple_linear_regression_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22beb6b4-adda-486c-84e8-80c52f586c16/domuradivejikuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/564f08f8-3589-4e26-9485-00ba3cde7ef7/bloons_monkey_city_cheat_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1455ab-5ae8-46a6-a245-e32fed145b55/zijagezuvosesuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c268be7-d9aa-4aba-b9b2-2de178eecf2d/71580837581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb267728-9b86-47b2-99c9-30c57283c0ed/lapuluwakajuvamadu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2658e18c5c478ec5073f/1606297178321/missing_addends_worksheets_grade_1.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfd642edfcd2bda919e2e/1606221156950/folding_wall_table_for_laundry_room.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_off0000c914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC914 5144 bytes
SHA-256: 53a067571a4dc16864256ecd95cad8ed78476d43b51af15b482f14f7aca84a19
font_01_sfnt_off0000dac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC8 10484 bytes
SHA-256: f8fb71fddca5c7beb57c9f4182d5282db9d6b0f8a979bd21f3d8e7d113a3c6e6

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