Malicious PDF — malware analysis report

Static analysis result for SHA-256 445d0d0a6a578097…

MALICIOUS

PDF

82.6 KB Created: 2021-04-01 20:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59f2f0ccb5c98fc63dad511ff6917f85 SHA-1: 4a2fb0d39407fa04d323a048b9104e8692fc154b SHA-256: 445d0d0a6a578097dbcaba0cf204eec65e110a53959ca0cfc1af9088e5bddc47
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing page. The document body, though partially corrupted, suggests a lure related to learning Russian, which is a common tactic for social engineering.

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://jumiwimov.ru/award?keyword=livre+pour+apprendre+le+russe+pdf
    • https://cdn.sqhk.co/zadorari/tijPOQt/infinite_loop_definition_dictionary.pdf
    • http://dubunidenore.iblogger.org/pejanudetodularagilovate.pdf
    • http://namabal.scienceontheweb.net/rimowuludas.pdf
    • https://cdn.sqhk.co/zetikitor/0NXvupu/good_religion_apps.pdf
    • http://tibagisuminove.sportsontheweb.net/rijonuzexoleriz.pdf
    • http://reform-st.ru/hp_elitebook_6930p_charger_specsaw65s.pdf
    • https://cdn.sqhk.co/kedilexele/hYI7L6W/free_teleprompter_app_for_android.pdf
    • http://scandisvet.ru/76802834841llt.pdf
    • http://raffle.website/radiation_island_full_game_apk_downloadxuvti.pdf
    • http://disewoterud.22web.org/sared.pdf
    • https://cdn.sqhk.co/jalinutaxos/cjaidij/vekoxoviberezazerekivun.pdf
    • http://rentline.pro/bradley_smokers_for_sale_ukhflr6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/76dce512-196d-429b-aec0-81121a425ce7/bulletproof_coffee_recipe_dave_asprey.pdf
    • http://munekekenagixo.rf.gd/ansys_topology_optimization.pdf
    • https://uploads.strikinglycdn.com/files/d3a3ea20-55a5-4a0b-97bb-fa2b9f009b6b/debivukiwazadozolulanen.pdf
    • https://uploads.strikinglycdn.com/files/951d668c-f06c-4deb-835a-2decbe7863c0/fikutivu.pdf
    • https://uploads.strikinglycdn.com/files/74983ed3-d09b-49dd-8962-1f702f501719/dozafizuvipomifonelafelir.pdf
    • https://uploads.strikinglycdn.com/files/aaf40771-f5df-4294-8398-09821a8c4a09/3807779499.pdf
    • http://bojilukirifep.rf.gd/how_to_remove_a_stuck_ink_cartridge_canon.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_off0000fc93.bin
699589e27e6b915e1c8b6449491b7b634325b6b60e10247e6228c0e349b319e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 5036 bytes
font_01_sfnt_off00010dcd.bin
99bcb23ff1542f0bbcde541406ee15f92efb9b9cfdd0497727acafc313570a43
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 15612 bytes