Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead8f0c566feeb4d…

MALICIOUS

PDF

66.9 KB Created: 2021-03-30 03:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d842b24b43975757a46f42c4419aca87 SHA-1: 2c7c45fbf3ccce8d54d789a2f1985a961fbc7900 SHA-256: ead8f0c566feeb4dc38971323cc975724614632192acfd8822ba0cedf90b290e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to 'https://crophysi.ru/strik?utm_term=words+that+start+with+zie', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure and embedded content suggest it is designed to trick the user into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=words+that+start+with+zie
    • https://cdn.sqhk.co/dufimogemeka/gjejhjj/frontline_commando_d-_day_hack_ios.pdf
    • https://cdn.sqhk.co/jubawiwa/h2KyWbC/billie_eilish_lovely_lyrics_ft._khalid.pdf
    • https://cdn.sqhk.co/letopoto/8igfgcH/murder_mystery_party_game_rules.pdf
    • https://cdn.sqhk.co/nupopobax/PMvhchc/electronic_components_kit_online.pdf
    • https://cdn.sqhk.co/reretukida/jgEhj8K/bajugajupinoref.pdf
    • https://cdn.sqhk.co/zogowefu/bNgcLJh/celestial_altar_not_enough_starlight.pdf
    • http://excellent-spb.ru/13612066038ialy6.pdf
    • https://cdn-cms.f-static.net/uploads/4384320/normal_605dc9d9408d0.pdf
    • https://cdn-cms.f-static.net/uploads/4462035/normal_605939679b9e2.pdf
    • https://cdn-cms.f-static.net/uploads/4413843/normal_602edf94df85b.pdf
    • https://cdn.sqhk.co/venitalobeni/gNLidVc/basketball_shooting_gun_price.pdf
    • https://cdn.sqhk.co/pixisuja/a9gOtjh/android_snackbar_duration.pdf
    • https://cdn-cms.f-static.net/uploads/4408475/normal_6013e773668ca.pdf
    • http://zabavnyi-slon.ru/how_to_replace_samsung_tv_remote_controls7tza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/def87b1a-0bb4-4eb3-815c-e8a5f1472a26/epic_emr_system_demo.pdf
    • https://uploads.strikinglycdn.com/files/a1e7b777-181b-448f-bad3-a385b7922d65/how_do_i_open_my_kindle_library_on_my_ipad.pdf
    • https://uploads.strikinglycdn.com/files/399d3c97-5d17-435f-9090-4a87e70452b0/icom_746_pro_repair.pdf
    • http://zuwemanikipe.rf.gd/carbonic_acid_formation.pdf
    • https://uploads.strikinglycdn.com/files/e50255c6-53ad-4dbe-a2a2-d42cb114fc2f/93337272404.pdf
    • http://lojuwuwa.rf.gd/40723738075.pdf
    • http://famutiparuzot.epizy.com/how_to_make_a_backwash_filter.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_off0000c9dd.bin
b9d7fb795de62433d2c1cfdaf5bb9f3936caf49ce266640d5b3717a06567af11
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DD 5036 bytes
font_01_sfnt_off0000db13.bin
bfecd54001bdf8a937ca09cf9005fde373701880c97b634ba0ec3110b4bc836e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB13 9800 bytes