Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d39330d5ad228f…

MALICIOUS

PDF

66.9 KB Created: 2021-04-05 21:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c16dca0f1af78a2ad28ab31698f7f83 SHA-1: b92ffe241f97817bd1ae17b857b71c0282cceea5 SHA-256: d2d39330d5ad228fe75655bf6d0e7738f911a884200ddc85bb13c4ce34865557
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://zajinet.ru/strik?utm_term=the+land+of+stories+the+wishing+spell+audiobook
    • http://kitigaw.22web.org/ambulance_siren_ringtone_for_mobile.pdf
    • https://cdn-cms.f-static.net/uploads/4488116/normal_6032d89f1b5da.pdf
    • https://cdn-cms.f-static.net/uploads/4378410/normal_604f23da5e3a2.pdf
    • https://static.s123-cdn-static.com/uploads/4392209/normal_5fc9f7d75d4bf.pdf
    • https://cdn-cms.f-static.net/uploads/4459477/normal_60243f957e6cc.pdf
    • http://datingsexchat.site/19181006534rzehg.pdf
    • https://cdn-cms.f-static.net/uploads/4490371/normal_605656f811a3b.pdf
    • http://nexipufogavajid.getenjoyment.net/angielski_czasy_testy.pdf
    • http://nejevefivi.mypressonline.com/88223585002.pdf
    • http://8gusevshop.website/acrylic_sheet_suppliers_in_coimbatoreycd6f.pdf
    • http://golomashvanna.xyz/1677668836np054.pdf
    • http://relax35.ru/fotemisibunavepupilp56y.pdf
    • http://form-lnstagramcopyrightservice.com/743860147669lzk2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gurabagoderes.atwebpages.com/big_fish_grill_rehoboth_de_menu.pdf
    • https://uploads.strikinglycdn.com/files/343cdb61-0eb7-439e-ae36-7d212d7dcbf7/vokofabenopugutumekegip.pdf
    • http://supitemev.rf.gd/how_to_connect_my_roomba_to_wifi.pdf
    • https://uploads.strikinglycdn.com/files/f97fd9b5-b8f3-4c28-a126-12e23f3c4619/chartered_financial_analyst_salary_in_india.pdf
    • http://fuxotarukiroro.rf.gd/75723251001.pdf
    • http://kugidozu.epizy.com/probability_questions.pdf
    • http://keregimuw.onlinewebshop.net/abstract_reasoning_test_questions.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_off0000c879.bin
ee9f0b81cad588c6e43fdd0860d76a1414052f83719ef2d23be24f21f75b7ccb
pdf-font-stream PDF embedded font (sfnt) at offset 0xC879 5548 bytes
font_01_sfnt_off0000db63.bin
a952ea3b03f3bef8f12d64a8baec771aa6aeb76c4df37e120a485ed678354ed7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 10236 bytes