Malicious PDF — malware analysis report

Static analysis result for SHA-256 5613f1c7a66a70ff…

MALICIOUS

PDF

73.2 KB Created: 2021-04-03 14:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a4a538d8a9e537341c6119984e7a107 SHA-1: 9511461b6ddb346a32fbffb334a058b38efa0bf9 SHA-256: 5613f1c7a66a70fff39741592c391a8645a76e068e29881ff4af712afc3fda53
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'metric conversion test with answers'.

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://kuzutuzo.ru/strik?utm_term=metric+conversion+test+with+answers
    • https://cdn-cms.f-static.net/uploads/4414491/normal_603b6d425d118.pdf
    • http://juzajikadig.22web.org/welizazezoxawojuluv.pdf
    • http://fikebek.sportsontheweb.net/administrao_geral_e_pblica_chiavenato_download.pdf
    • http://rigoditibalun.mywebcommunity.org/57947858208.pdf
    • https://static.s123-cdn-static.com/uploads/4465543/normal_5ff714e146f1a.pdf
    • http://wozekozexufoxol.scienceontheweb.net/57890853324.pdf
    • https://cdn-cms.f-static.net/uploads/4418575/normal_602809d6e1aaf.pdf
    • https://static.s123-cdn-static.com/uploads/4454052/normal_5ffcb211a5784.pdf
    • https://static.s123-cdn-static.com/uploads/4494648/normal_5fe4e43c5acf9.pdf
    • http://zefutuwukeras.getenjoyment.net/migitujufititavetuj.pdf
    • http://fibutogu.mywebcommunity.org/who_invented_queso_dip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://boludit.rf.gd/487048447.pdf
    • http://gakupoxefale.epizy.com/oracle_forms_forms_ddl_commit.pdf
    • http://fotuxike.epizy.com/84033082963.pdf
    • http://rugizasuvodaw.rf.gd/where_can_i_get_a_cuckoo_clock_repair.pdf
    • http://demunoj.epizy.com/pompeii_guided_tour_from_salerno.pdf
    • http://marilineme.epizy.com/dasoz.pdf
    • http://popeganezawojeg.rf.gd/luzibasuxetej.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_off0000e0d1.bin
20c2ca0dffb8bc8a93549541efc7619fafaaf417708750be612c774efb12453b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 5012 bytes
font_01_sfnt_off0000f1fa.bin
cbb6c7f86bc8d5924e70c2d3caa209b35f6dab5849cb92b505d07ee08788eb59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 11352 bytes

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