Malicious PDF — malware analysis report

Static analysis result for SHA-256 f853ed4edda553fd…

MALICIOUS

PDF

76.3 KB Created: 2021-04-02 06:37:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10af36bf272b3e07bb8f8e33d9cf4a5c SHA-1: 9fac244352e418545244b42953cd76559058e729 SHA-256: f853ed4edda553fd30926eaafba06d50907d8853de7049b9010e66a8e9e9775e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, 'https://vilenefex.ru/wix?keyword=endless+war+defense+google+sites', suggests a lure related to a game to entice users. While no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used for phishing and malware distribution.

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://vilenefex.ru/wix?keyword=endless+war+defense+google+sites
    • https://cdn.sqhk.co/pesasotiro/jhjhfPz/superheroes_bus_racing_games_apk.pdf
    • http://supportcopyright.net/19426968808j2cos.pdf
    • https://cdn.sqhk.co/kagurase/gkCiiie/mefamopasi.pdf
    • http://liwadaxezaf.getenjoyment.net/56477969721.pdf
    • https://cdn.sqhk.co/mawedabe/AjfHPjf/blue_balloons_meaning.pdf
    • http://reawolt.online/pajafepumiketuvemu3ypk.pdf
    • http://usesalle.xyz/fortescue_metals_group_annual_report_20165o3l0.pdf
    • https://xuzitimezavut.weebly.com/uploads/1/3/1/8/131856372/perofopuzawoweb.pdf
    • https://cdn.sqhk.co/gujadozede/q7vhijc/76121426074.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://nutristrike-shop.ru/wisapenedorigorinunugijm1036.pdf
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/410283.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://soxarigur.myartsonline.com/4642471962.pdf
    • http://jupevesu.atwebpages.com/lysistrata_summary.pdf
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_b5b47ab377684f59accda305793ab7e8.pdf?index=true
    • http://jeximojela.myartsonline.com/fodoxovibadoraverelimu.pdf
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_6da4bd3785284dd891143c7495b9d3b5.pdf?index=true
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_cbfc995a53c84c63a998d845f2f88045.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1eb.bin
316f938709fd5e8ba0b4d13e224d88fadf0d462940621dd35020b2a84547a272
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EB 4912 bytes
font_01_sfnt_off0000f2bb.bin
063551ffebc0351f92fb605a7ecb48de05992f1a2f73151712ae8c0a52430f1a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 10300 bytes
font_02_sfnt_off0001160b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x1160B 4324 bytes