Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd54c8839aea563…

MALICIOUS

PDF

78.1 KB Created: 2021-04-09 14:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b7890410d9597d6fd9313832fda95a0 SHA-1: 48b5f3e3789008eebd7411753b5f1b80ea44a17d SHA-256: 7dd54c8839aea563d0885775e78f598496da11e7602ca8848f48baaa15b5196b
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URL 'https://fokemale.ru/strik?utm_term=apc+back+ups+es+700+turn+off+beep' suggests a phishing or malware distribution attempt. The PDF structure and ML classifier output further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/strik?utm_term=apc+back+ups+es+700+turn+off+beep
    • http://kuliwegi.sportsontheweb.net/wolonilolofaju.pdf
    • http://supernefritroller.xyz/dawevasrkap.pdf
    • http://akillidestekbasvuruformu.online/python_programming_projects_for_beginnerswsyv5.pdf
    • http://you-bestshop.xyz/84233066006ncdme.pdf
    • http://rotugozebowovu.iblogger.org/mewabiruraleruxotim.pdf
    • https://zepemotofilizag.weebly.com/uploads/1/3/5/3/135399015/2214812.pdf
    • https://rimenedefogifu.weebly.com/uploads/1/3/4/4/134466040/1e14c7859660.pdf
    • http://feldhaus-klinker-plitka.ru/japunipotidomubovakxu3vu.pdf
    • http://bodaweziwov.mypressonline.com/arminianismo_a_mecanica_da_salvao_minhateca.pdf
    • http://portkamesto.site/hindu_calendar_september_2019_downloadt2zbr.pdf
    • http://levojefozaloro.mywebcommunity.org/livumokujaradimuwomonod.pdf
    • https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/69d7685e.pdf
    • http://rijupoxog.22web.org/5229568410.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1a116992-70be-4ffe-b445-8c31ceb6a620/corona_universal_pole_saw_blade.pdf
    • http://gizimup.epizy.com/can_t_help_falling_in_love_violin_and_piano.pdf
    • https://uploads.strikinglycdn.com/files/c18d8ab9-030e-4b1e-9d40-a952767d1ee0/pavoniwelobexokejedude.pdf
    • http://nujebij.onlinewebshop.net/gujugilal.pdf
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_acb8e45f052e40c9be15cdba2d5f0021.pdf?index=true
    • http://fiforeru.atwebpages.com/varuwadidadi.pdf
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_9aa9ea7965f64a038206a1241eec17a5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c793db76-483d-4f7a-be4f-65a093f8ef4c/what_are_the_parts_of_a_kitchen_faucet_called.pdf
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_f5f02ab37fa446d4bf20c0bb1873b778.pdf?index=true
    • https://uploads.strikinglycdn.com/files/873a3fe9-bd22-466f-ba46-c62e0fe39158/1657584788.pdf
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_58e5e938204f4f72a00eae4d04e58bdb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f9.bin
c90e6da03e53cb82659c1376bd06491ada9ce92a11b29105dae5c28671931bea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 5392 bytes
font_01_sfnt_off00010364.bin
64ef9d8b85b01fca6c07fbf1fda58994137defa439d3fefa2f2ae6ff7d51d8ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10364 11824 bytes

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