Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a90ccbc9dbba237…

MALICIOUS

PDF

81.7 KB Created: 2021-04-21 09:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f82cb1d9ab128b9c84f2e17079082a4b SHA-1: 5ee5cafc2512d78eef243c3f04df252c96f142c2 SHA-256: 3a90ccbc9dbba237e7f6a3254f55614394e9ad82d07cf8a2dc1cf139e9f8a4d8
96 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 multiple embedded URLs, one of which is a phishing lure related to financial due diligence. The presence of these URLs suggests an attempt to redirect the user to a malicious site for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=financial+due+diligence+checklist+kpmg
    • http://bigijawiv.scienceontheweb.net/how_can_you_tell_how_old_a_hot_water_heater_is.pdf
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/2339178.pdf
    • https://cdn-cms.f-static.net/uploads/4420018/normal_5fd9e2377765f.pdf
    • https://cdn.sqhk.co/kutogudofi/fRyijhf/tevabejanojomomejo.pdf
    • http://interstart.online/vazefizagibupodukeo872u.pdf
    • http://vodoroding.info/lutusijumirlnke5.pdf
    • http://xojuxelase.medianewsonline.com/71290228907.pdf
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/6258225.pdf
    • http://hdsamara.ru/zejazuroropoluzormq1f.pdf
    • https://wiguvizokon.weebly.com/uploads/1/3/0/7/130776253/dusefejija-nuzaxet-teketokibu.pdf
    • https://cdn.sqhk.co/gadewekunel/0Thc4ij/bapenev.pdf
    • https://cdn-cms.f-static.net/uploads/4494432/normal_603ff65482a7e.pdf
    • http://towexiwi.sportsontheweb.net/the_phantom_of_the_opera_oxford_bookworms_stage_1.pdf
    • https://cdn-cms.f-static.net/uploads/4410956/normal_6032d5aa7a052.pdf
    • https://cdn.sqhk.co/tosijoxopum/iijaijf/37168817110.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nojikigor.myartsonline.com/a_song_of_ice_and_fire_book_4_read_online.pdf
    • http://rosevasejila.myartsonline.com/96393443278.pdf
    • http://fatapiwav.rf.gd/hundreds_tens_and_units_worksheets_year_3.pdf
    • http://razafif.epizy.com/oxford_dictionary_and_thesaurus.pdf
    • http://napalujimawoz.rf.gd/marina_abramovic_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f23d.bin
3136bd705179b7b524518c34a2bf3ad8905952ed488fed46c897c3c991964c86
pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 3212 bytes
font_01_sfnt_off0000fdbe.bin
a6882bce1ed861f819c4e90e478e8ec8bb7e5f665846e55bff7d327f62a2afdb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 5412 bytes
font_02_sfnt_off00011004.bin
397bbc674b1797bee505c0881b6c093df449fd412dfba56015d92550fa39c9e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11004 12076 bytes