Malicious PDF — malware analysis report

Static analysis result for SHA-256 92414c3c0d25828f…

MALICIOUS

PDF

74.6 KB Created: 2021-02-19 20:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 17fe5112e38bd743121610a2b760b084 SHA-1: 7876fe50c903578d274b86579c44b58ca3eb0490 SHA-256: 92414c3c0d25828f7ec8c235799107f989d1dfa7ab59760cf26710f123e74a86
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to 'maypoin.ru', which is flagged as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to a 'chapter summary'. The presence of external URIs and the overall detection by multiple security tools indicate a phishing or malware distribution 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://maypoin.ru/strik?utm_term=king+of+thorns+chapter+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5fe771cbdf7f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486987/normal_60029646873f9.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/bzhgZge/great_white_angry_shark_simulator_sea_world_simulator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490724/normal_6005d0f687e96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_5fcd9e498fdef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451955/normal_6029e07b332ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_6024137f30eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_602cab58d1bac.pdfIn PDF document text
    • http://busivel.xyz/i_d_rather_have_jesus_music_sheet19ptt.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/69027410280ruyc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5ff174a4838ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460686/normal_6015570ae28e6.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/Shb6Mgh/85572163621.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/jjAjhBP/niwedusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_601371a495312.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483604/normal_6007be4965b2d.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/gdjh2P3/zojabikasodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AA 5468 bytes
SHA-256: eb9d27dd53ceae11afaadfaf252d29c4a23d3e9955f4e7df1efb010b3ed83185
font_01_sfnt_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 10376 bytes
SHA-256: 99acdeaf0de63fff387f87b072c94ce7c913a99ea58b0a3ca76b494ae5affcc8

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