Malicious PDF — malware analysis report

Static analysis result for SHA-256 236f80e436e7704b…

MALICIOUS

PDF

178.7 KB Created: 2021-04-05 01:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d70d849eecebc59632bc837bd91df48 SHA-1: a5d74481010fde9858b280bbc8ea77bfdc127700 SHA-256: 236f80e436e7704bdc7fac2c2ab54abea32ed4b61aa4a252b352d1e815dbd3f3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload by posing as a legitimate document. No scripts were extracted, but the presence of a malicious URI and the overall detection profile strongly suggest a phishing attempt.

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://resalured.ru/award?keyword=history+of+english+fiction+pdf
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/rugunepaleber.pdf
    • https://damafurota.weebly.com/uploads/1/3/5/3/135337485/jinuwisigowuba.pdf
    • https://xezamojukugenu.weebly.com/uploads/1/3/5/3/135316948/wirupuwuvasena-fexupikugoxos-gelapesapodide.pdf
    • https://dovoviwum.weebly.com/uploads/1/3/0/7/130776035/7235561.pdf
    • https://ponirusorigimo.weebly.com/uploads/1/3/0/7/130738629/nusoze.pdf
    • https://sugasukeni.weebly.com/uploads/1/3/4/8/134878852/1772523.pdf
    • https://pumujeguda.weebly.com/uploads/1/3/5/3/135330988/6526d.pdf
    • http://zemimumaloger.iblogger.org/adobe_photoshop_elements_for_pc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tewilojejesuj.epizy.com/tutorial_dashboard_excel.pdf
    • https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_8fac2d27f6ae4cee8b5039704474a6af.pdf?index=true
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_e996505856aa422492e1ecdf02b95bc3.pdf?index=true
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_fe75416aedb4442b9dc85a51c85e5e23.pdf?index=true
    • https://s3.amazonaws.com/mokixetat/vatifokobimowodafopew.pdf
    • https://s3.amazonaws.com/lodazojamuva/32528859531.pdf
    • https://b9b086bb-db5c-4c47-b99c-4ca3d8c772c1.filesusr.com/ugd/c090b7_11b77ffd3a184765b9ce6bba10443ce5.pdf?index=true
    • https://s3.amazonaws.com/muvemasoxaji/dibugijuwagoxobeje.pdf
    • https://s3.amazonaws.com/bubodeliza/live_sports_hd_tv.pdf
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_2988f244778e4a039bb2ee18760b1983.pdf?index=true
    • https://d4a58959-25bc-41ae-a48c-99f47e3c4711.filesusr.com/ugd/4dab1e_4a94f7270d054f4c9f1da8423a05ef76.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_off00027f5d.bin
9b249196be8d23ed81a5d71c50f679a2f609ac56bcb7d7be2486deeb059f593d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27F5D 5272 bytes
font_01_sfnt_off00029151.bin
4b665f513557b80d3bf71f2f42ad7ad5e3854649c72fb5741862baf5cb013203		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29151 13764 bytes

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