Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb636fdeae4b07c…

MALICIOUS

PDF

68.9 KB Created: 2021-03-19 16:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 426bff115da8b2de5e8f649dd8dd38e4 SHA-1: 797a10fc132284493d79ab53ec65ec6b2db14440 SHA-256: 6eb636fdeae4b07cb3dc4bc584ed4ee8afc7a128fc8f0e42de1bd3eee5618714
96 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, one of which is flagged as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a catalogue theme, likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/award?keyword=catalogue+schneider+automatisme+et+controle+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/kolokejo/JheXlij/boat_drivers_license_texas.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/area_and_perimeter_of_compound_shapes_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/Vjhijgd/8405654710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_60537a21bc364.pdfIn PDF document text
    • https://cdn.sqhk.co/pevotido/gg2gigg/juvojimikesorukupizuvus.pdfIn PDF document text
    • http://dudoxanudito.scienceontheweb.net/free_career_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_60342885c2d63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449990/normal_5fdfb89699186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468537/normal_602e6413e01ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_6019bb368e3a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_60218dc745a30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_604071a4e3393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5ff0c0bb6c134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502567/normal_601eeb6c21dab.pdfIn PDF document text
    • https://cdn.sqhk.co/kowumutajaw/gv8Lugf/usa_today_online_subscription_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_5fd2770970d9c.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/F7hjZnV/technogym_skillmill_connect_treadmill.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456132/normal_60352b8da54cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/peacock_slider_turtle_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/44982078737.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/pukukizenokekotizunovamo.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/nokabutuvesamum.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/printable_emergency_contact_list_template.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_off0000cdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF9 5748 bytes
SHA-256: 8f6c4dc1c73d5fb49b3b9e166573e69a0302be70722d785b040cd4ba95a1da4b
font_01_sfnt_off0000e158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE158 10660 bytes
SHA-256: 7099f9f23c9c02f6117860a336ce8e1720fbcc113587533717b3bf2d2588d873

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