Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f07b88f88be357b…

MALICIOUS

PDF

96.7 KB Created: 2021-03-17 02:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2129c049f8e8c46286224708a251abc6 SHA-1: b2faa751b0f54378bd07ffa8fd0b2c1b37692848 SHA-256: 1f07b88f88be357ba5a9e543104564df7735e84a50475a7e87a070bb3c492651
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the presence of an external URI points to a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/award?keyword=urticaria+angioedema+anafilaxia+pdf
    • https://cdn-cms.f-static.net/uploads/4379387/normal_6030a4042e5d1.pdf
    • https://cdn-cms.f-static.net/uploads/4371004/normal_602c9cf38bc29.pdf
    • http://pedaxofanor.mywebcommunity.org/topographic_map_reading.pdf
    • https://static.s123-cdn-static.com/uploads/4495050/normal_60037c04170c3.pdf
    • https://cdn-cms.f-static.net/uploads/4368474/normal_6042df202de96.pdf
    • https://cdn-cms.f-static.net/uploads/4420222/normal_60387e556cbfd.pdf
    • https://cdn.sqhk.co/noneniwetav/iihu8d9/33376567155.pdf
    • https://static.s123-cdn-static.com/uploads/4390069/normal_5fca0501ec8fe.pdf
    • https://cdn-cms.f-static.net/uploads/4489057/normal_605144c169f8f.pdf
    • https://cdn.sqhk.co/dupetodim/bkwIHyv/hepatitis_a_vaccine_side_effects.pdf
    • https://static.s123-cdn-static.com/uploads/4450415/normal_5fe32d14c273f.pdf
    • https://cdn.sqhk.co/tegatiwuwax/hatinhb/feworudexufi.pdf
    • https://cdn-cms.f-static.net/uploads/4417652/normal_6027476865cfc.pdf
    • https://cdn-cms.f-static.net/uploads/4477878/normal_601a16067ee42.pdf
    • http://fibiver.mygamesonline.org/67850370723.pdf
    • https://cdn-cms.f-static.net/uploads/4383923/normal_6042c32ad630a.pdf
    • https://cdn.sqhk.co/pajokiman/ijoPKXA/sling_tv_channels_2020.pdf
    • http://wipunemobak.mygamesonline.org/agatha_christie_books_for_sale.pdf
    • https://cdn-cms.f-static.net/uploads/4379959/normal_5fdb3c7b310cd.pdf
    • http://gowanenutik.mypressonline.com/piano_sheet_music_easy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/60354646-8c57-425d-ad5a-d451318c53ea/geremab.pdf
    • https://uploads.strikinglycdn.com/files/f2f10445-4cbf-4dd8-97e6-48f2de65b409/dell_latitude_e6410_driver_pack_windows_xp.pdf
    • http://tobidogajetu.onlinewebshop.net/interview_questions_for_english_teachers.pdf
    • https://uploads.strikinglycdn.com/files/554baa34-3eff-4777-b4ee-8975f23b0316/the_book_thief_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a29.bin
a021b209f4a8f30ff826c28faf28b434752cd70846dc8ec553017cf3f4891971		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A29 5356 bytes
font_01_sfnt_off00014c57.bin
b36fbbda9442089e1273ebc9021d06c2e02fbd8bbedcd198535d0a1732b7a773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C57 12896 bytes

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