Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fe816a2e2a5348…

MALICIOUS

PDF

88.9 KB Created: 2021-05-14 08:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99bc3022b2fbf315c7b6aa5a4ed226c1 SHA-1: 7917e521ffe8d9f1ad3825501ee5fdd4df8f091b SHA-256: f0fe816a2e2a534859936acaab69c2ab6e7f1bdcdb0fa08b37e9b6f27fb2712b
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, with one explicitly noted as an invisible link to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'Kali linux hacking for beginners pdf'. No scripts were extracted, but the presence of multiple malicious URLs points to a phishing or downloader attack pattern.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jacksth.ru/strik?utm_term=kali+linux+hacking+for+beginners+pdf
    • http://blekrossi.ru/samsung_dishwasher_dw80k5050us_installation_guidekugzv.pdf
    • http://kevareso.iblogger.org/python_dictionary_append_key_error.pdf
    • http://lelazuw.iblogger.org/compendio_del_catechismo_della_chiesa_cattolica_2020.pdf
    • http://gifawel.22web.org/49357980835.pdf
    • http://bonboxstudio.com/leica_ascii_format_fileavryr.pdf
    • http://loginwithfb.site/nunebifofolugufe4u8lj.pdf
    • http://podarokinsta365.site/lean_ux_hypothesis_templaten8tii.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_dc1ab51cb5eb40ac8f912cb9b8ee58db.pdf?index=true
    • http://gobozukelawi.epizy.com/backtrack_linux_vmware.pdf
    • http://sasoregasot.epizy.com/18299681657.pdf
    • http://rorulapuvutoj.epizy.com/asbabun_nuzul_al.pdf
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_9033c0aa1e494640bf2007e00a93984f.pdf?index=true
    • http://sejojoxo.epizy.com/sociologie_politique_l1_droit.pdf
    • http://lumigetutiburu.epizy.com/doubt_a_parable_theme_essay.pdf
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_9f3f15dba8784c308580a48707fbfe78.pdf?index=true
    • http://wabeworozad.rf.gd/83398945316.pdf
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_5e3928e9cf48445fa493955efa23fbbe.pdf?index=true
    • http://gajijijada.rf.gd/gakedorologakikurep.pdf
    • http://vokozebutiri.rf.gd/mowudilovizobafej.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_off00011a53.bin
462e93a995200be79f36d5b779cfc64a3a69a7971cf386d2996323fd9fc187c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A53 5656 bytes
font_01_sfnt_off00012d8a.bin
394441fc9870e8977e563ed2a4ff5468263d0f13f5c5a91674b95022b381b181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8A 11896 bytes

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