Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de10137ab45753c…

MALICIOUS

PDF

79.1 KB Created: 2021-03-22 20:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bcc30a0d089ad83ad00589b01c8cb89 SHA-1: 9f0f7144bb58c513b7fbba9f362277f7f520b249 SHA-256: 5de10137ab45753c2956e0ba44eea4c05614fb23a3f2e982b81620edd823bf01
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'botokaw.ru' was extracted, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and the presence of an external URL indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=what+reading+level+are+the+chronicles+of+narnia+books
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5ff29f8824f99.pdf
    • https://cdn-cms.f-static.net/uploads/4408976/normal_6057b8017f3ba.pdf
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/bf65ef660c.pdf
    • https://cdn-cms.f-static.net/uploads/4477623/normal_604f7724cf10f.pdf
    • https://cdn-cms.f-static.net/uploads/4459629/normal_604f613880372.pdf
    • https://gewuvakir.weebly.com/uploads/1/3/4/6/134660990/bf107.pdf
    • https://cdn-cms.f-static.net/uploads/4407306/normal_60556ed275453.pdf
    • http://vuzuwul.getenjoyment.net/xaxenezalumeroxanudaj.pdf
    • https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/jagitosodise-rizoge.pdf
    • http://ruguwafe.scienceontheweb.net/tezifopidulopizasilab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/821867a9-1b14-42db-9f4d-cb08306c53fb/93573498578.pdf
    • https://s3.amazonaws.com/wujafivabipo/wordpress_theme_development_guidelines.pdf
    • http://jujageritoxo.atwebpages.com/2295900829.pdf
    • https://s3.amazonaws.com/kotodur/68258774105.pdf
    • https://uploads.strikinglycdn.com/files/b720315e-9b85-4c65-884e-60605d4f3443/56953180162.pdf
    • https://s3.amazonaws.com/loxopudizus/16917287544.pdf
    • http://zipemoluligera.myartsonline.com/alchemist_drinks_menu.pdf
    • https://s3.amazonaws.com/zolerazowubow/possessive_nouns_worksheets_3rd_grade.pdf
    • http://dijuvunote.onlinewebshop.net/aromatic_and_alicyclic_chemistry.pdf
    • https://s3.amazonaws.com/petikamov/eddie_bauer_xrs_65_convertible_car_seat_installation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb51.bin
e06e91acc463e7520458c50745b96fcad635b93f68c2af450783f25005b07587		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 5348 bytes
font_01_sfnt_off0000fd8a.bin
ad67d569f9b3a2d2dfff85800142ab8f4148735f66fcf8302e29c043eb8e8dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 10604 bytes
font_02_sfnt_off000121b1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121B1 4324 bytes

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