Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ace43f25ac0e03b…

MALICIOUS

PDF

79.7 KB Created: 2021-03-29 03:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82b1665f43613da57afc1bf1ac26e152 SHA-1: 7d09cabe36df6f69b13045b9619e06cc6e224d69 SHA-256: 0ace43f25ac0e03b6a6a166894114393bc88bbfbaac0a778a041a627ee36a8de
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to school leave applications.

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/123?utm_term=application+letter+format+for+leave+in+school
    • https://cdn-cms.f-static.net/uploads/4486987/normal_604d4050ab61f.pdf
    • https://cdn.sqhk.co/puzukebejas/biehfje/88478100075.pdf
    • https://cdn.sqhk.co/gojinuma/eH3MzuP/walkthrough_for_dead_by_daylight_mobile_survivor.pdf
    • https://cdn.sqhk.co/likunubiba/fieibZg/stackable_washer_and_dryer_set.pdf
    • https://cdn.sqhk.co/wugotiparo/dhgdmid/26851558316.pdf
    • https://cdn.sqhk.co/sirepajaku/hnChs39/bizipubi.pdf
    • https://cdn.sqhk.co/mowefakura/jeiaYij/47165683154.pdf
    • https://cdn.sqhk.co/wadusazilox/ff9hbhd/sozajon.pdf
    • https://cdn.sqhk.co/zimidenex/jcQu8Ls/16007393680.pdf
    • https://cdn.sqhk.co/temirikuji/Wgcieih/swiss_ice_hockey_cup_live_online.pdf
    • https://cdn.sqhk.co/wixefawoz/ihhNNxe/calendar_2021_january_marathi.pdf
    • https://cdn-cms.f-static.net/uploads/4403120/normal_602bb9593d298.pdf
    • https://cdn-cms.f-static.net/uploads/4414867/normal_60594fe7c9d0f.pdf
    • https://cdn.sqhk.co/godezixibufo/gcMgfnD/49218020172.pdf
    • https://cdn-cms.f-static.net/uploads/4375071/normal_6015857011573.pdf
    • https://cdn-cms.f-static.net/uploads/4464720/normal_602dce7a53702.pdf
    • https://cdn.sqhk.co/kagumuzom/MjghcYq/checkers_online_2_player_link.pdf
    • https://cdn.sqhk.co/xawobovuji/dibgg35/youtube_offline_video_download_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bezorito/whatsapp_plus_gold_edition_apk_free.pdf
    • https://s3.amazonaws.com/besafefaf/tracheostomy_care.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_off0000fada.bin
1a1720350ef670bd1d958e49eadb732313741a977782d8f2db890e061ded42ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 5304 bytes
font_01_sfnt_off00010cbf.bin
36c4eb952a3686515e04aaaf1783dea053aeb2afdf873590055d8c410f7f2163
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBF 10776 bytes