Malicious PDF — malware analysis report

Static analysis result for SHA-256 6362ea817c6d3cbf…

MALICIOUS

PDF

76.9 KB Created: 2021-03-13 22:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b96b19a548a703c3859256b9de8bc51 SHA-1: 6eebd7b9be5f179134c24517dc1cfd2147ade2c8 SHA-256: 6362ea817c6d3cbfe5699bbff30908ec6ed4f22a2d3fbbee760bceb39b4c6156
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classification and ClamAV, with a specific detection name indicating it is a phishing trojan. The embedded URL suggests a lure to a website, likely to host a malicious payload or further phishing content. The document body, though heavily obfuscated, appears to be a lure related to 'free easy piano sheet music'.

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://botokaw.ru/123?utm_term=free+easy+piano+sheet+music+chopsticks
    • https://static.s123-cdn-static.com/uploads/4423188/normal_600141d5a6fee.pdf
    • https://cdn-cms.f-static.net/uploads/4458633/normal_6025c244d424e.pdf
    • https://cdn-cms.f-static.net/uploads/4496151/normal_601a018907eba.pdf
    • https://static.s123-cdn-static.com/uploads/4415525/normal_60094eaf7b7c0.pdf
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5ff35373e8c4b.pdf
    • http://majafapabukores.iblogger.org/bailey_love_26th_edition.pdf
    • https://static.s123-cdn-static.com/uploads/4425913/normal_6005da5175c6f.pdf
    • http://komaxinatobofe.medianewsonline.com/how_much_does_staples_charge_for_shredding_paper.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xitunixanamo.epizy.com/mezoles.pdf
    • http://gajutar.onlinewebshop.net/72375863135.pdf
    • https://s3.amazonaws.com/tupofelasujewas/43358441476.pdf
    • https://uploads.strikinglycdn.com/files/158514a8-8992-4237-b068-30838d73b4ff/adobe_premiere_cc_2017_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/dbbf8e7c-ff4c-462c-b57e-7fcf013ae7e1/zafizofogutawosijefalivab.pdf
    • https://uploads.strikinglycdn.com/files/7117c99b-6d20-44a9-92d2-85f158b38abe/94773327143.pdf
    • https://uploads.strikinglycdn.com/files/3f82b378-c145-4946-804f-4be53c80057e/how_do_i_reboot_fios_router.pdf
    • https://uploads.strikinglycdn.com/files/d6193f10-7b93-4387-99fd-db6c7a75580c/twilight_breaking_dawn_book_pages.pdf
    • https://s3.amazonaws.com/bubodeliza/82855244105.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1dd.bin
1652519782225fa57e80b21c7f6ef74255e61d5a84006ee069bdcff9a9d7218d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DD 5144 bytes
font_01_sfnt_off0000f32f.bin
cb168f8d86dd103b401760836703cb5fae28a808f34fde81316e11fdb5efd8e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF32F 10916 bytes
font_02_sfnt_off00011844.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11844 4324 bytes