Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c218c35d07e64b…

MALICIOUS

PDF

85.5 KB Created: 2021-04-02 21:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3df441b17f47e30eaa310e5954507f6 SHA-1: 1e752951664683bb85506f2d7f72afb405e10aeb SHA-256: 80c218c35d07e64b8a9b47aa689c1ddd2a59bb01c5614b451acb456542360e4e
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 suspicious domain, disguised with a lure related to 'Diary of a Wimpy Kid'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the presence of an external URI points to an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://jumiwimov.ru/strik?utm_term=diary+of+a+wimpy+kid+1
    • https://static.s123-cdn-static.com/uploads/4454671/normal_5ff675b58acf4.pdf
    • https://cdn.sqhk.co/xumefugafa/Wayjbhe/hard_rock_music_festivals_2020_usa.pdf
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fec9f347d8f2.pdf
    • https://cdn.sqhk.co/dabozijide/rierdja/skywars_roblox_script.pdf
    • https://cdn-cms.f-static.net/uploads/4368985/normal_6039169428a0d.pdf
    • http://xefibusutama.22web.org/fibrosis_adalah.pdf
    • https://cdn-cms.f-static.net/uploads/4367947/normal_60540366a106f.pdf
    • https://cdn-cms.f-static.net/uploads/4499636/normal_6036a41e57a06.pdf
    • https://cdn.sqhk.co/tipekafomube/C9hbggj/fujezemidedupuzujasewe.pdf
    • https://static.s123-cdn-static.com/uploads/4465543/normal_5fee6865cb768.pdf
    • https://sorezoxawo.weebly.com/uploads/1/3/2/7/132712551/birafezivizudo-bulovogem.pdf
    • https://cdn-cms.f-static.net/uploads/4387046/normal_601dcfe7cb7ec.pdf
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/8010247.pdf
    • https://cdn.sqhk.co/rilixuzewiv/eij0Ogd/cyo_basketball_kingston_ny.pdf
    • https://dosijarirolid.weebly.com/uploads/1/3/4/6/134668623/sojilov.pdf
    • https://cdn.sqhk.co/venitalobeni/jqjfctq/10605982358.pdf
    • https://cdn-cms.f-static.net/uploads/4422638/normal_6029a595870ff.pdf
    • https://wiperorapaxomun.weebly.com/uploads/1/3/5/3/135323561/kudegikokoxetumo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_7791cf7d310c4bb0b800996105127b98.pdf?index=true
    • http://kiwajuku.epizy.com/workbook._save_as_c.pdf
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_35f18f10ac274da190ee16ee80493f55.pdf?index=true
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_fc6fb10270f24f1d845df06eebdd2f0b.pdf?index=true
    • http://worazuwimitital.epizy.com/occupational_health_and_safety_act_summary.pdf
    • http://wusumuforibit.epizy.com/mcgraw_hill_education_10_act_practice_tests_4th_edition.pdf
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_ff889526b61641ab89caad981d0dacb9.pdf?index=true
    • http://kofujuluzode.epizy.com/besukalatinupuvadev.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_off00010e75.bin
b686fe74e5ed04e04fd8ce34d101e03ad2c3a517933b5cd5f464ec6615e28bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 5288 bytes
font_01_sfnt_off00012084.bin
1f1cea87b98aa40d7590d3cff88eeaeee22897a756e5c7b23bd89711dc514d21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12084 11900 bytes

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