Malicious PDF — malware analysis report

Static analysis result for SHA-256 118ef35203b58856…

MALICIOUS

PDF

71.9 KB Created: 2021-04-07 07:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4e8c6c87952dfe374b3e0e2cea147e7 SHA-1: 57b345e0fbe601d079821887c64fa8db7d8a6079 SHA-256: 118ef35203b58856a5e9e13985f77edf34dbeb0e8da120141649d3b1264dcade
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to health information to encourage user interaction with the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=signs+and+symptoms+of+heart+failure+pdf
    • https://cdn.sqhk.co/buruvalufe/icjbgju/satag.pdf
    • https://cdn.sqhk.co/duditizonut/khftgi2/jutuxirila.pdf
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5fda78687ac95.pdf
    • https://static.s123-cdn-static.com/uploads/4495691/normal_5fefff5fd8c65.pdf
    • http://lakegefufen.scienceontheweb.net/cat_2020_mock_test.pdf
    • https://cdn-cms.f-static.net/uploads/4458388/normal_5fd2e85be72ae.pdf
    • https://cdn.sqhk.co/laxefotogulo/djdkAVa/xorasoviloxeze.pdf
    • https://cdn.sqhk.co/fugovigul/eicXjdg/minecraft_earth_skin_download.pdf
    • https://cdn-cms.f-static.net/uploads/4386349/normal_6062a148be491.pdf
    • https://puwubebuserow.weebly.com/uploads/1/3/4/4/134403982/7863903.pdf
    • https://vakexojukesazi.weebly.com/uploads/1/3/0/9/130969985/6186440.pdf
    • https://vixojuderapu.weebly.com/uploads/1/3/2/3/132303060/9853feaf9245cd.pdf
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/2c47e6a2510.pdf
    • https://zaxefuki.weebly.com/uploads/1/3/5/2/135299090/ad1f307d7f18.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sirilagewuga/turepuxovusurakofe.pdf
    • https://s3.amazonaws.com/wexukufedepim/my_kenmore_washer_stops_at_spin_cycle.pdf
    • https://s3.amazonaws.com/lewuli/zizemibevab.pdf
    • https://s3.amazonaws.com/lemefofutomapox/87306455904.pdf
    • http://rodisasedozax.myartsonline.com/87476889125.pdf
    • http://zerowegujij.onlinewebshop.net/how_to_bake_cake_in_panasonic_microwave.pdf
    • http://xawiwevivuzox.onlinewebshop.net/67875773653.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_off0000dab0.bin
1d2610bb02d239049e48a8843447997071febd47d7eef4d9197f686e259f11ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB0 5660 bytes
font_01_sfnt_off0000edce.bin
747648694af3a1da7ea3cee9e604dd4e35da30e13f25ef7e91f9ba0c9dbac69b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 10612 bytes