Malicious PDF — malware analysis report

Static analysis result for SHA-256 92003bca887be9f7…

MALICIOUS

PDF

111.2 KB Created: 2021-03-08 15:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3cdb2f5a103cf287e078a921fcbd58a SHA-1: 72a4bc4168f5c61305e81833b1203a4f2237ee5e SHA-256: 92003bca887be9f72af8e84f946ac970dfcf2752e7cff050ae9d4216b0896aca
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The PDF contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, contains text related to 'sickle cell anemia crisis treatment guidelines', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=sickle+cell+anemia+crisis+treatment+guidelines
    • https://cdn.sqhk.co/kanereneb/icrmQia/no_man_s_sky_vr_performance_issues.pdf
    • https://cdn-cms.f-static.net/uploads/4493578/normal_60114d20ef13c.pdf
    • http://nujijaj.getenjoyment.net/fight_club_2020_trailer.pdf
    • https://cdn.sqhk.co/rafatuvolix/ihglmja/wedinoregadiva.pdf
    • https://static.s123-cdn-static.com/uploads/4372378/normal_6007ed33eb358.pdf
    • https://static.s123-cdn-static.com/uploads/4452594/normal_5fdf8e8c9f30d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gotitibekovi/pimozamu.pdf
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_1000949583e942c99f56938718985d52.pdf?index=true
    • https://s3.amazonaws.com/xoguwavosuje/elberton_granite_guidestones.pdf
    • https://uploads.strikinglycdn.com/files/fc09a8fb-205b-41a9-8c5b-5f05c44cbf0d/how_to_light_my_majestic_gas_fireplace.pdf
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_24a5aa03cd80401c86f216cb6fb576bf.pdf?index=true
    • http://teluroluxeterez.myartsonline.com/nidixezuna.pdf
    • https://uploads.strikinglycdn.com/files/fac5f8d7-593f-40df-bf22-7270a3ec0763/29593402863.pdf
    • https://s3.amazonaws.com/nazekisigiduz/totimobutugomebawaz.pdf
    • https://uploads.strikinglycdn.com/files/21766777-df40-4538-815c-c129612feab6/microsoft_excel_learning_file.pdf
    • https://s3.amazonaws.com/muvazi/john_deere_310e_backhoe_repair_manual.pdf
    • http://zenakezogutomu.onlinewebshop.net/fojomovugapazafal.pdf
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_cf3ccd2c54ae4ad6a47243a111a03296.pdf?index=true
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_638fae7837044026ac895e20c3d9769b.pdf?index=true
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_0a3902c91a0c447e8913dc065dc9dc86.pdf?index=true
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00017823.bin
8301593821f4ef8f4a4f02be65446c1828f4cb7da7eba75b7749ac7e8b2b6cf5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17823 30116 bytes
font_00_sfnt_off00013f9e.bin
45763dee6483aa2dca24b5924d526b306f6f22c80ac339b59d02619944de7c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9E 5424 bytes
font_01_sfnt_off000151fc.bin
e44030e0929b3dde958193b458ca678c9e360baceee3c6aa909a04864d0435c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151FC 11596 bytes

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