Malicious PDF — malware analysis report

Static analysis result for SHA-256 344db596dc68509f…

MALICIOUS

PDF

74.0 KB Created: 2021-02-25 07:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a428205f4682e63535db7acc0e05246 SHA-1: e6eac6b0e402f38b80f8e9b9ff7badfdff45e372 SHA-256: 344db596dc68509f6c4f9615bd448b7ff68fb26d37a0253a24d79a6009f2117b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be related to search terms, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=quicktrim+fast+cleanse+side+effects
    • https://cdn.sqhk.co/komagiju/eqE1kJS/equalizer_2000_cast.pdf
    • https://cdn.sqhk.co/risubibasero/Gzaeiej/2056456246.pdf
    • https://cdn.sqhk.co/muvotugi/mjficSA/38692266412.pdf
    • http://reduslim-sito.site/37526281694xv92u.pdf
    • http://prazdnikprosto.ru/rijesam8bz9.pdf
    • http://moymagazin.xyz/27248243860d8c4h.pdf
    • http://healthytrands.com/30045336705bcz34.pdf
    • https://cdn.sqhk.co/fokofike/4hiARK3/asana_rebel_get_fit.pdf
    • http://lenudes.com/liwowiwamazue6eba.pdf
    • https://cdn.sqhk.co/xogixute/aqgijbn/thoroughbred_diesel_location.pdf
    • http://de-bewertung-id2842384.icu/33150409512n1dek.pdf
    • http://akillidestekbasvuruformu.online/mgma_medical_assistant_salary6xh0g.pdf
    • https://cdn-cms.f-static.net/uploads/4388283/normal_6031ae35e40d8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wifukedot/87762573201.pdf
    • https://s3.amazonaws.com/bidurudilidujug/dotara.pdf
    • https://s3.amazonaws.com/jirebonudur/ridifirenimiwunojikarutu.pdf
    • https://s3.amazonaws.com/kovezodepugov/cafeland_apk_hack_2019.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_off0000e60d.bin
22d1d70f2c63b9ca196114165ffde7c368d86b58e9c1fa6bf96aa74870951d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 5292 bytes
font_01_sfnt_off0000f7f4.bin
2f79ad28c642baeee3cdcea1246e534d652bba221b6997d3460e47fabee08e73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 10196 bytes

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