Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92f38e53f987837…

MALICIOUS

PDF

77.7 KB Created: 2021-02-28 23:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcfec67c3557c5c8e7951972c0cb5ce5 SHA-1: bb2acd1162a4de806157ce9259ba64fcd60f1b74 SHA-256: d92f38e53f987837b3e20f467d3a60fa08d2c8aa1bf25d319ffc633b316ce450
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 URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a user manual, aligning with common social engineering 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://jumiwimov.ru/strik?utm_term=kidde+model+kn-coeg-3+user+manual
    • http://creamwalls.space/nezofubepoziledugafepuzi3zx2u.pdf
    • https://static.s123-cdn-static.com/uploads/4426699/normal_5fdf1d0dbdb7f.pdf
    • https://tuwowezofe.weebly.com/uploads/1/3/0/7/130775341/da4aa83.pdf
    • http://gekifek.scienceontheweb.net/how_to_replace_a_belt_on_a_kenmore_elite_oasis_dryer.pdf
    • https://votebefi.weebly.com/uploads/1/3/4/7/134715150/zerere_mizamelom_dopoto_tiredawux.pdf
    • http://kismykeitio.best/darofewisetezofusifi9fl0d.pdf
    • http://lezigovedavide.getenjoyment.net/bbg_free_workout.pdf
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/fupix-nugirasen-fikiwuzet-fepixej.pdf
    • http://instas.site/bleach_illustrated_guide_to_soul_reapers2bbcm.pdf
    • https://cdn-cms.f-static.net/uploads/4477921/normal_5fe652feebf30.pdf
    • https://jaxevilin.weebly.com/uploads/1/3/1/6/131606955/4930481.pdf
    • http://republvinb.fun/9610472802qxszs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fidomibudirej.rf.gd/bookshelf_door_minecraft_ps4.pdf
    • http://judewal.rf.gd/63728707952.pdf
    • http://dazidotidipo.rf.gd/jezotit.pdf
    • http://rigexeleza.rf.gd/kojikajipomoren.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_off0000f22f.bin
87e4b14482d4778a138cec94b09a0847c5cff64b8a8f5fb41a55768011bafb63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 5488 bytes
font_01_sfnt_off000104c5.bin
06c75603dccf08a3bbdca50fcc37b3c00f6d273d0a3acfe58b5c15f22750fe0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C5 10940 bytes

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