Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1fbf66155f5b9a…

MALICIOUS

PDF

74.4 KB Created: 2021-03-23 19:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 322e4ff109f997da41341df57ac484bc SHA-1: 58be0f5b9ba1808316b489a373b75a807b67e908 SHA-256: 9a1fbf66155f5b9a02229574d2b6cccff004dde02a133e17f6ed9771d6cc2187
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://dugedepap.ru/strik?utm_term=what+author+killed+himself', which is likely a phishing lure. While no scripts were explicitly extracted, the presence of embedded URIs and the PDF structure suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

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://dugedepap.ru/strik?utm_term=what+author+killed+himself
    • http://nitesufi.sportsontheweb.net/97473675787.pdf
    • http://psychologyrelax.xyz/3430002191138tr5.pdf
    • http://yoga-italy.space/47762137713u9tdy.pdf
    • http://pogadai.xyz/beethoven_piano_sonata_1242134.pdf
    • http://hdvideo.design/17294986280urxgn.pdf
    • http://sakulog.sportsontheweb.net/why_is_my_galaxy_s8_not_connecting_to_wifi.pdf
    • http://nuzalozipofeven.22web.org/south_africa_miss_universe_2019_answer.pdf
    • https://rixowumunek.weebly.com/uploads/1/3/5/3/135330445/nutemow.pdf
    • https://vusexojepaxeva.weebly.com/uploads/1/3/4/0/134096357/8115697.pdf
    • https://mefimume.weebly.com/uploads/1/3/1/4/131437875/daniwobexeb-jepuxijejoxozez-dixakuwutokok-didazizalevas.pdf
    • http://proita.space/147488250108n1uo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kokidali.rf.gd/11447850738.pdf
    • https://uploads.strikinglycdn.com/files/c2956ec0-5cbc-4a96-b484-b99727f3fa2b/how_to_check_apc_ups_battery_health.pdf
    • https://uploads.strikinglycdn.com/files/5c8225a3-1372-4714-8d12-4e78d1c95505/78597152097.pdf
    • http://bolumopip.rf.gd/sda_pathfinder_classes.pdf
    • https://uploads.strikinglycdn.com/files/39d51091-346d-441d-bf15-7347fb208c37/rirelewegiri.pdf
    • http://laguwirir.epizy.com/35844797627.pdf
    • http://wolevovugubim.epizy.com/kojadizukef.pdf
    • http://dixabaxoji.epizy.com/7318315197.pdf
    • http://kixazogegome.epizy.com/67860779646.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_off0000e735.bin
95b576fbbf27aeb3df0e092c5a1f494445e8c29c49c43a237b8583e2ef6361d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 5224 bytes
font_01_sfnt_off0000f8d9.bin
16e32b46b6986623e868f3d613c719f735c4cc31b547c1eb05585d3b1f7bba25
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 10444 bytes