Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d87f4a608a869f…

MALICIOUS

PDF

77.4 KB Created: 2021-03-27 20:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5892cf09fd05e0c64d667cfbad5a2a10 SHA-1: e44e88621d81b720211190cfffa294bd6b626594 SHA-256: a9d87f4a608a869f791c8a893e2ddd4ccd7bca6ff3426530a27583c455e86e0e
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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to industrial equipment, likely to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/award?keyword=calderas+acuotubulares+y+pirotubulares+pdf
    • http://nuvotana.22web.org/94005156427.pdf
    • https://cdn.sqhk.co/zivuzigup/ibIhb1W/dilureruxekidojuno.pdf
    • https://cdn.sqhk.co/rosojolude/iimWjhq/xusulebimutuxafusetak.pdf
    • http://bazunujovi.scienceontheweb.net/imperatives_esl_exercises.pdf
    • https://static.s123-cdn-static.com/uploads/4490371/normal_5ff84ac275988.pdf
    • https://cdn.sqhk.co/tamejenonisi/Bif6VqX/tywin_lannister_death_father_s_day.pdf
    • https://static.s123-cdn-static.com/uploads/4495393/normal_6005799b6ab05.pdf
    • http://dosodowonuraf.iblogger.org/the_magic_flute_1975_full_movie.pdf
    • https://cdn.sqhk.co/buwisotubu/gcXgcE8/cheat_engine_apk_no_root_terbaru.pdf
    • https://cdn-cms.f-static.net/uploads/4528260/normal_60327473935f0.pdf
    • https://cdn.sqhk.co/xobitabab/WrgerwR/navazaxenusiwonujeremo.pdf
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5ffbd44ce98f4.pdf
    • http://lofajemami.sportsontheweb.net/nudaxexepuwuxokulelofuvis.pdf
    • https://cdn.sqhk.co/xopigotax/jigixjg/alaska_wallpapers_ghana.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zuvuzevo.atwebpages.com/fajajak.pdf
    • http://nosigegu.onlinewebshop.net/amlodipine_package_insert_davis.pdf
    • http://pudolajuji.atwebpages.com/jewusalavudew.pdf
    • https://s3.amazonaws.com/mizeteb/banting_grey_list.pdf
    • http://xuperaletofigaz.epizy.com/how_to_change_wallpaper_on_kindle_fire_tablet.pdf
    • https://s3.amazonaws.com/vipuxafol/7883979349.pdf
    • http://zixupikitudid.epizy.com/nccn_guidelines_for_breast_cancer_screening.pdf
    • http://wisunomimat.epizy.com/jamedasapagulawuzokuzam.pdf
    • https://s3.amazonaws.com/nimuwet/susumawi.pdf
    • https://s3.amazonaws.com/satedafadusizo/70084138185.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_off0000ebef.bin
199c4a4ab8a806f4ab485dfd43244741cead17753045da7ca52b38ed9be9dbfd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 5296 bytes
font_01_sfnt_off0000fdff.bin
4715d23867bcc65d944a89ca5004ad3c523115ef92162860711ef1c7dec82e3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 12480 bytes