Malicious PDF — malware analysis report

Static analysis result for SHA-256 623f8c62f53db027…

MALICIOUS

PDF

207.5 KB Created: 2021-03-20 05:26:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fed38dffe4e2672c38d6aff62c75833 SHA-1: b3e9c3e0011fc9694295c975f65a446fd26705d2 SHA-256: 623f8c62f53db027b9e778363502bf0b5059a2d3b1adf346977ecb437646cc4e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a secondary payload or visiting a phishing site. The document body, though heavily obfuscated, contains keywords related to the URI, suggesting a lure for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://lozipotod.ru/award?keyword=evangelismo+pdf+elena+white
    • https://toruganaduloxo.weebly.com/uploads/1/3/5/3/135347606/roxufakew.pdf
    • http://wemuwetafivaxe.sportsontheweb.net/lamborghini_aventador_fiyat_2020_sahibinden.pdf
    • https://zutujoxiker.weebly.com/uploads/1/3/0/7/130776667/gosune.pdf
    • https://terigemi.weebly.com/uploads/1/3/1/8/131856376/715422d.pdf
    • http://kinemulawaw.sportsontheweb.net/jesurabafubelisemewupogom.pdf
    • https://bekarofadu.weebly.com/uploads/1/3/4/3/134346179/3344101.pdf
    • http://fejugutafilevin.scienceontheweb.net/what_is_the_highest_paid_nurse_position.pdf
    • https://nokidevekixim.weebly.com/uploads/1/3/2/3/132302759/5ce419d1.pdf
    • http://povisowalikim.scienceontheweb.net/companies_acceptance_of_deposit_rules_2020_mca.pdf
    • http://korixoludofuguk.scienceontheweb.net/mawelopebigovujagibekid.pdf
    • http://xutexukoxobofi.mywebcommunity.org/can_you_use_verizon_hotspot_for_home_internet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xidazeze/emerald_spire_5e.pdf
    • https://s3.amazonaws.com/xukanomarexumu/1665913777.pdf
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_4d96e639c61643cd8596dacaba1d45b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/424524c5-db9c-4fc9-9c0a-af3f5bac13dc/87122687878.pdf
    • https://uploads.strikinglycdn.com/files/8398c48e-8202-4b8a-9568-8e461d9423e9/kawibonumubuxosizileduvew.pdf
    • https://uploads.strikinglycdn.com/files/6b28761f-84bc-4de2-9f85-3d52ab3d8f7c/21344724807.pdf
    • https://s3.amazonaws.com/tikoweravisixu/malisimoxajejinidog.pdf
    • http://duvodix.myartsonline.com/alla_prima_used_book_for_sale.pdf
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_fa5af1e0ee3048caa7c600026647e981.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e706.bin
13818b61a30c7f1201e3d2a8bd58b20e7401daf9dbd0901dc67c979a0cb0964b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E706 5256 bytes
font_01_sfnt_off0002f8d5.bin
cb560407412a77562da235806f88f30274a063578990fde9b0a4c8d596f8f52d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8D5 12336 bytes
font_02_sfnt_off00032113.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32113 4324 bytes

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