Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff73ad8205bb6f9c…

MALICIOUS

PDF

79.6 KB Created: 2021-03-15 17:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c88876bbb3bab3c39453a43e1d996ec SHA-1: 198189521b56bef43e38f13c30a7a9b3e8cc88d5 SHA-256: ff73ad8205bb6f9cfda81a59527f4ebb02153128a6b1b46579aed12ba49250c9
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a search result or download link for a book, thereby luring users to the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/aws?utm_term=the+young+elites+pdf+weebly
    • https://cdn.sqhk.co/bovuzane/heihjhk/64588976408.pdf
    • https://static.s123-cdn-static.com/uploads/4454170/normal_6000a25a10a53.pdf
    • https://cdn-cms.f-static.net/uploads/4416661/normal_604b73609d2f5.pdf
    • http://tipaxoj.66ghz.com/all_cells_perform_various.pdf
    • https://cdn-cms.f-static.net/uploads/4373511/normal_6029dec682dda.pdf
    • https://cdn-cms.f-static.net/uploads/4460677/normal_6016ec85c2c68.pdf
    • https://static.s123-cdn-static.com/uploads/4409997/normal_6000060ca9089.pdf
    • https://cdn.sqhk.co/bagadogod/jhgYMjf/dotefojigaxoripagakafisim.pdf
    • https://cdn.sqhk.co/foroboreb/iar7OfB/rockville_underseat_subwoofer_review.pdf
    • https://cdn-cms.f-static.net/uploads/4482849/normal_601b26bd0baef.pdf
    • https://cdn.sqhk.co/woledibiroju/gMihDNP/65583200003.pdf
    • https://cdn.sqhk.co/kuzetuzame/KWyElgi/angry_plants_classic_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tisudaxutuz.epizy.com/microsoft_access_crackeado.pdf
    • http://xanawuvogi.epizy.com/voxudojiv.pdf
    • https://uploads.strikinglycdn.com/files/6dd57890-8323-41b3-aad6-0136290136b2/predator_generator_2000_oil.pdf
    • https://uploads.strikinglycdn.com/files/214ac6dc-eeda-4afe-b3b6-c8b4054ebe70/halliday_fundamentals_of_physics_10e_slader.pdf
    • https://uploads.strikinglycdn.com/files/8fff5dee-7590-4879-bea1-0cfae06ff174/lista_de_verbos_irregulares_en_portugues_conjugados.pdf
    • http://jejemizon.rf.gd/guzodizipubamorawarelifo.pdf
    • http://momejawepafad.epizy.com/cancer_gastrico_2020_mexico.pdf
    • http://pirefalanife.epizy.com/what_does_post_stand_for_in_meetings.pdf
    • https://uploads.strikinglycdn.com/files/3672eaee-e73c-4866-a604-53658903db79/begatodum.pdf
    • https://uploads.strikinglycdn.com/files/39c1c2ef-539f-4890-95aa-824662e82f34/hp_probook_4530s_webcam_driver_for_windows_10.pdf
    • http://mifamin.epizy.com/40857270006.pdf
    • http://japefafe.epizy.com/judovizaronibefubem.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_off0000f81a.bin
18647ec2fca7f1adeafc2478ba78dee26949b47c43eee3981a765e5086dd25ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81A 5280 bytes
font_01_sfnt_off00010a2f.bin
48be35bcad587d59b9b1a8c80e51d794581f9e8d2dc2155f4b96e74e654491fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2F 11276 bytes

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