Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b546bcc1533f71…

MALICIOUS

PDF

72.1 KB Created: 2021-03-23 04:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b858a316bbace68e7122a7e46a69af31 SHA-1: 780ea271ddd22833fc29be835880e34267988127 SHA-256: 59b546bcc1533f713393b35b2ad95000e3f63fedab2ea80718835916eea69a11
136 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains embedded URLs that point to potentially malicious domains, suggesting an attempt to redirect users to phishing or malware distribution sites. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of commands that could be used to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/wix?keyword=straight+through+cable+definition
    • http://molefomisapeput.mypressonline.com/70417157678.pdf
    • http://zekaxezixil.medianewsonline.com/84697256458.pdf
    • https://cdn.sqhk.co/tipefima/VhbuhaC/football_manager_2019_steam_key.pdf
    • http://fasad-dom.site/alarma_viper_3105vbhbuk.pdf
    • https://static.s123-cdn-static.com/uploads/4422137/normal_60035eed632e4.pdf
    • http://kokulotasuz.mygamesonline.org/funivukejimobazisevo.pdf
    • http://pop-marketplace.ru/what_is_the_poem_ozymandias_mainly_aboutkeep4.pdf
    • http://adminhalil.com/87666789713truby.pdf
    • http://suwufexez.sportsontheweb.net/how_to_get_curl_waves.pdf
    • https://cdn-cms.f-static.net/uploads/4374986/normal_6036317286636.pdf
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5fd3ccacde2ef.pdf
    • https://cdn.sqhk.co/mogowepuw/gjJgjgh/rujuduwipipoxalili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tameladizikep.atwebpages.com/30093556029.pdf
    • http://bugenerefajujus.atwebpages.com/bivefakevivepowexujokurin.pdf
    • http://sabixukavizom.myartsonline.com/integral_calculus_with_solutions.pdf
    • http://duxepivol.myartsonline.com/antiplatelet_drugs_pharmacology.pdf
    • http://noratev.myartsonline.com/kizopirerabamulapavadu.pdf
    • http://pujumek.myartsonline.com/27984046217.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://sabixukavizom.myartsonline.com/integra
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da53.bin
587404a865c12fb34ce9de1a65936a256e1f46655349b9e8b6108a2aa8bbe82f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA53 5348 bytes
font_01_sfnt_off0000ec7a.bin
aa5a3025227af65a57ef982558bbf80105024b4a42f5b7c7546cf7a6183d54e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 11428 bytes

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