Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ea5f31a36b1166…

MALICIOUS

PDF

73.0 KB Created: 2021-04-04 04:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4c3be928dd0fb7a7d01036f0599c746 SHA-1: bcd366f195edc8e1a6e20531d7cbf376d28bc2da SHA-256: 68ea5f31a36b116611ec4c80e398744d167facaafc365c8359c5a985fac7ad13
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'nipisod.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily corrupted, suggests a lure related to educational content, aligning with common phishing tactics.

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://nipisod.ru/wix?keyword=go+math+5th+grade+chapter+11+extra+practice
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdf
    • https://cdn-cms.f-static.net/uploads/4494868/normal_60283ba6ab4f6.pdf
    • https://cdn-cms.f-static.net/uploads/4446034/normal_602ea6a71ece5.pdf
    • https://cdn.sqhk.co/kesufetumo/hePkiil/juego_de_drones_para_android.pdf
    • https://cdn.sqhk.co/lotivadafe/EK8jihi/86200267644.pdf
    • http://kuninikulu.iblogger.org/73891206688.pdf
    • https://cdn.sqhk.co/febowozefu/hhgdTge/revuvizabudusupezipabobuj.pdf
    • https://static.s123-cdn-static.com/uploads/4417830/normal_5fe4530bd8ef8.pdf
    • https://cdn.sqhk.co/miburixegapu/jcihijf/roblox_games_to_play_online.pdf
    • https://cdn.sqhk.co/bezofusipow/kicgdOa/god_of_war_battle_theme.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dofomexikokubeb.epizy.com/cobra_29_ltd_classic_cb_tricks.pdf
    • https://s3.amazonaws.com/zoromexemuzid/add_and_subtract_fractions_with_unlike_denominators_activities.pdf
    • http://kenasaxoxaxober.rf.gd/unix_commands_for_hadoop.pdf
    • https://s3.amazonaws.com/nademopor/tuzamu.pdf
    • https://s3.amazonaws.com/wazorixekunafob/68376540904.pdf
    • http://mabuxet.epizy.com/bade_bhai_sahab_premchand.pdf
    • http://pivewumo.epizy.com/azar_app_free_for_pc.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_8770fd9d0e254898bfb781253b7ed912.pdf?index=true
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_cdcde160a8e24e4b9da1c1159b3976cb.pdf?index=true
    • 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_off0000e18a.bin
6ba954023faadce025b49e6b798a4c857d6b08c0ea26d50480b35508267c72a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 5552 bytes
font_01_sfnt_off0000f44f.bin
8e45bb50ce6e02f90347022e98d29ac17696efaf8b1cdf55e097d362192d1234
pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 10108 bytes