Malicious PDF — malware analysis report

Static analysis result for SHA-256 b379f71d8d96b91d…

MALICIOUS

PDF

86.2 KB Created: 2021-03-28 23:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 843f87f8669c81150cde56edd2f264ec SHA-1: 5baed3bb82b8015909eb1245abb6a29e7c16d51f SHA-256: b379f71d8d96b91d0053c88c798210454f399475eff5f3781bf0dd25988ac084
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'botokaw.ru', which is likely the download source for a malicious payload. The presence of a visual download button heuristic further supports the phishing lure 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/123?utm_term=hunter+full+movie++filmywap
    • https://cdn.sqhk.co/vovewotutal/bzjejge/22_marvel_movie_collection_dvd.pdf
    • http://xipodijajul.sportsontheweb.net/logivifamaxiwawewekalig.pdf
    • http://juzufezike.mygamesonline.org/nemexixamizuboridizelosob.pdf
    • https://cdn.sqhk.co/dorejewibiz/jOgcggV/stampede_temecula_open.pdf
    • http://ruwemipuwev.mypressonline.com/mijibakazutovasesiguvi.pdf
    • https://cdn.sqhk.co/takodabu/cygfgdO/cure_the_incurable.pdf
    • http://ziviludemedo.iblogger.org/65315858252.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://malinaliwul.epizy.com/beginner_guitar_chords_sheet.pdf
    • http://wivufaw.epizy.com/bosch_automotive_handbook_10th_edition_download.pdf
    • https://uploads.strikinglycdn.com/files/46404f19-b28b-426c-b01a-8f7ab3ef1786/68904473571.pdf
    • https://uploads.strikinglycdn.com/files/769f11fb-50d5-4c50-b801-f6fa2c3a3667/hp_officejet_pro_8600_os_x_driver.pdf
    • http://xofatodifukox.rf.gd/72023006442.pdf
    • http://rulumagevamed.epizy.com/bpsc_final_result_2018.pdf
    • https://uploads.strikinglycdn.com/files/710e9bdb-8782-4d14-96d6-b720a5ea12c4/la_gallina_degollada_analisis_psicologico.pdf
    • http://kuzotekekejepun.rf.gd/advanced_korean_vocabulary.pdf
    • https://uploads.strikinglycdn.com/files/677c335c-3470-4495-afb0-f52b82cb53fb/ic_756_pro_2_manual.pdf
    • https://uploads.strikinglycdn.com/files/771f1f68-c260-4eba-8b58-4e2b1a93fdc5/starting_a_cake_baking_business_from_home.pdf
    • https://uploads.strikinglycdn.com/files/ca1c1fc9-7a52-4ae4-b817-e3b9b537488f/80505209192.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa48.bin
9ff36bddc4f73f486ca4595a61c77511eba6427f5ffb07d12aa2a222db9874a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA48 5084 bytes
font_01_sfnt_off00010b9a.bin
26860617d58b1ae44a68aa08541e57f69444c4de4e9ccf33b21ef14c8d756d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9A 11184 bytes
font_02_sfnt_off00013205.bin
3ed9d0e1ac559c736c20fae280e53dbef9d3007c0145de6a13cc5b91b3146c76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13205 17256 bytes

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