Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb08f295443fe88…

MALICIOUS

PDF

85.7 KB Created: 2021-03-16 17:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e71052f6683c9237da2bb7f8a4930ad SHA-1: e2711d495a00c338925340acb6e3dee716328256 SHA-256: 3eb08f295443fe8827bddcd89623551e8b18b2c761c18061098146329c9d2e7e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs, suggesting it is designed to redirect users to malicious websites, likely for phishing or malware distribution. The presence of external URIs and a link farm heuristic further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/award?keyword=medical+terminology+anatomy+for+coding+pdf
    • https://static.s123-cdn-static.com/uploads/4380858/normal_5fcf0106e5e66.pdf
    • https://cdn.sqhk.co/kagelemovo/ha4jbwe/top_gear_streaming_2020.pdf
    • http://tozofuji.scienceontheweb.net/69819124229.pdf
    • http://kazimibi.getenjoyment.net/25852498757.pdf
    • https://cdn.sqhk.co/nadokikado/MiiTjcK/enemy_strike_mha.pdf
    • http://kovamuwaropepu.getenjoyment.net/english_logical_reasoning_questions.pdf
    • http://zumewidife.mygamesonline.org/2359168695.pdf
    • https://cdn-cms.f-static.net/uploads/4413007/normal_603eb4bf320f9.pdf
    • http://wibevuzu.iblogger.org/43034967911.pdf
    • https://cdn.sqhk.co/vopofuxo/qjbBPjd/66942231116.pdf
    • http://zisapawiwako.mypressonline.com/pdf_orthographe_francais.pdf
    • https://cdn.sqhk.co/madosodu/cgeGhgf/civilization_revolution_2_review_android.pdf
    • https://cdn-cms.f-static.net/uploads/4388272/normal_60412af7c7d5b.pdf
    • http://lupaper.22web.org/petazirirokisizotafus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0404cab7-c021-4537-be79-420bcb2f88cc.filesusr.com/ugd/52c240_28125df8ff4f4486a4b5c175a07bd33b.pdf?index=true
    • http://gesejovefovu.rf.gd/11793392159.pdf
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_b7f6fa38514848d3a8b49c14644d5ab3.pdf?index=true
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_b9d05d31da44436ba6d911f11d8ceca1.pdf?index=true
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_865035e7f02f4e0e8df1e74fc9a573d3.pdf?index=true
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_744c415abef547078ac18ac25821e40a.pdf?index=true
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_9c4a5f3209f94f99879b2c9fb7598e12.pdf?index=true
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_4ea9a32664f94ca49095ae7ebdde128f.pdf?index=true
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_58c31c934c9a4dbc8d39168e11bf6828.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_off00011003.bin
b784d085502c927e21f75979fd8ef0940f916b865f155ae423f48943e2ab682b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11003 5404 bytes
font_01_sfnt_off00012267.bin
e62a5886e1a2c79358ca5d69c55cb0f6ab0d88ae5bb5cb8a2556779a2a01bac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12267 11336 bytes

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