Malicious PDF — malware analysis report

Static analysis result for SHA-256 94574b3fabcfd9df…

MALICIOUS

PDF

84.5 KB Created: 2021-05-01 22:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 950cb3483e8884490f4a27212cac97ca SHA-1: 7ec47132cf33d954e7efeb5515d8dc2a33e69524 SHA-256: 94574b3fabcfd9dff5d8e5b92fcb5b08481feb76dc9a8ebac2bcd8e661544875
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV and an ML classifier as malicious. It contains an embedded URI pointing to a suspicious domain, suggesting it's designed to redirect users to a malicious site. The document body is heavily obfuscated, but the presence of external URIs and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=theory+of+relativity+musical+characters
    • http://lovepositions.info/35018669101h61tb.pdf
    • https://cdn-cms.f-static.net/uploads/4482863/normal_605135b9d68f9.pdf
    • http://creamwalls.online/girugupikokijafuradetzbxwk.pdf
    • https://cdn-cms.f-static.net/uploads/4389376/normal_6052b863104fb.pdf
    • http://extraevents.ru/bagafadafexaranfwe1.pdf
    • http://tihefers.online/leica_m6_ttl_0.85_framelines7dd8r.pdf
    • http://ourfutures.space/el_porfiriato_en_yucatan1sd40.pdf
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/06cc7380cf.pdf
    • http://limuzinof.ru/how_a_finite_element_analysis_workspt4hq.pdf
    • https://cdn-cms.f-static.net/uploads/4477886/normal_6054e52d1adb6.pdf
    • https://cdn-cms.f-static.net/uploads/4482854/normal_60506d34e529e.pdf
    • http://capridigi.com/ink_cartridge_for_hp_j4680_printer6fojb.pdf
    • http://polfact.site/83003466149zqdk4.pdf
    • https://fetavagipiw.weebly.com/uploads/1/3/1/3/131380759/8586167.pdf
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/bujobivikovatas.pdf
    • http://romeita.space/tornadoes_today_in_gaxfs79.pdf
    • http://basvuruizleme.online/cubic_boxing_3d_apk_downloaddfkci.pdf
    • http://rawenspant.online/fijorsulzu.pdf
    • https://cdn-cms.f-static.net/uploads/4457000/normal_6035456900a8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_ba9d675bcdbd4d67aeaac83074882cfd.pdf?index=true
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_196971e63acc4718870e6c805dca2bd7.pdf?index=true
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_a463c321bc144a008b15727b0140bad2.pdf?index=true
    • https://ad060920-74d0-4a59-a46a-f478898ed72a.filesusr.com/ugd/a7c1e6_e95c4eb71e4f42e3adf73724b82b73a4.pdf?index=true
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_e24a32bb28cc4dadbb1b1df50fa71840.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_off00010cac.bin
14d5043ced39253af39a5b3d4566503689f5531f950e6f4cde902ad2115317b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAC 5232 bytes
font_01_sfnt_off00011e60.bin
41e6c5a890b557ae344c8f77a7a2f966768f19c0b8db30d32cef585ec83522b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E60 11324 bytes

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