Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee92eb170794e70…

MALICIOUS

PDF

79.1 KB Created: 2021-03-10 13:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673977b2d5449a452c5d3304dbe039bc SHA-1: 54d5bdca223d4cfa81ae5ed93f0b81841d91e8cf SHA-256: aee92eb170794e706c0e1a4982818e5bbbee6d242fe786ee0eeab8ae91b99ff5
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'mezovuduw.ru' suggests the document is designed to redirect users to a potentially harmful site. The document body, though heavily obfuscated, contains text related to 'traumatic brain injury pdf' and 'wkhtmltopdf', indicating a lure to disguise the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=que+es+traumatismo+craneoencefalico+pdf
    • https://cdn-cms.f-static.net/uploads/4417669/normal_6014910a248a7.pdf
    • https://static.s123-cdn-static.com/uploads/4465147/normal_5fcd4fb5cf672.pdf
    • http://mexuloxuxinona.iblogger.org/android_browser_history_export.pdf
    • http://argo-tourism.com/boxakeduytpkx.pdf
    • https://cdn-cms.f-static.net/uploads/4479688/normal_6023561498c22.pdf
    • https://cdn-cms.f-static.net/uploads/4490519/normal_603b9edd3c1fc.pdf
    • https://static.s123-cdn-static.com/uploads/4486763/normal_5ffb7e44c7ccf.pdf
    • https://cdn-cms.f-static.net/uploads/4468274/normal_601b7df5b61a1.pdf
    • https://kigimijufofudiv.weebly.com/uploads/1/3/5/9/135977026/47ca170e00.pdf
    • http://gakmancreatures.ru/givinafutenixikol82bb.pdf
    • https://depasosuva.weebly.com/uploads/1/3/4/4/134483816/68424.pdf
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/953372.pdf
    • http://werenntaq.online/tips_for_among_us_mobilejc7s2.pdf
    • http://creditstar-kabinet.com/lean_canvas_editableeso2q.pdf
    • http://czecheducation.space/50588774346rfrey.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wofelekupobepo.epizy.com/72346749914.pdf
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_f525d53285cb4165beff48fc4026392a.pdf?index=true
    • http://wadokeg.epizy.com/zudanod.pdf
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_53a9bd3171f4482389aa03494f50e320.pdf?index=true
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_fbbe265aae4c4d33ab14a6a260cd4760.pdf?index=true
    • http://zolewari.rf.gd/73591568453.pdf
    • http://menawikilu.rf.gd/7458511837.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_off0000f65c.bin
09077c6334d90d293089f528327cd1385fba8d9dfc9c69302bd851cf48feb3b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 5360 bytes
font_01_sfnt_off00010882.bin
460ce851b318182a1835033f52a63ee7418958570030b3c5a77833ef181f9412
pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 11028 bytes