Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83ddd7e962c3fa3…

MALICIOUS

PDF

81.6 KB Created: 2021-04-01 03:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44e39a51e27e59bec811566681e8fc6e SHA-1: b7af7ab3b756c8d6b839929fb24a4edf42ed91cc SHA-256: c83ddd7e962c3fa323682becedfd85ae14ec66f9d694541ae7f316a2f9b2904e
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, likely intended to redirect the user to a phishing site. The document body is heavily obfuscated, but the presence of the URI and the overall detection suggest a phishing or credential harvesting attempt.

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://kuzutuzo.ru/award?keyword=solution+elementary+book+pdf
    • http://minosijasif.mypressonline.com/31092894494.pdf
    • http://xebiniseba.mygamesonline.org/80873437213.pdf
    • http://logawedulukudan.mywebcommunity.org/bocio_simple_tratamiento.pdf
    • https://sonefuvik.weebly.com/uploads/1/3/4/3/134325549/99779b0097ee34.pdf
    • https://cdn.sqhk.co/diwamukef/ihWhghc/43852171837.pdf
    • https://cdn.sqhk.co/rekubapapup/jejhqbb/pixel_launcher_xda_no_root.pdf
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/279418.pdf
    • https://cdn.sqhk.co/sosexazefip/OKheheF/49535739034.pdf
    • https://cdn.sqhk.co/luzorisu/CgiErAU/34060227911.pdf
    • https://zejaxosadakawur.weebly.com/uploads/1/3/4/3/134372542/kanibu_ziligekujegug.pdf
    • https://cdn.sqhk.co/gegatuzikat/UWdghiK/alienware_keyboard_aw768_warranty.pdf
    • https://mibelilav.weebly.com/uploads/1/3/4/7/134747519/8845341.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/513da11b-4037-46da-844e-d209c3fca051/wordly_wise_3000_book_5_lesson_12.pdf
    • http://jabodegodonirad.atwebpages.com/functions_of_international_law.pdf
    • http://kageditivumimor.onlinewebshop.net/gemepabovubofubitilomipor.pdf
    • https://uploads.strikinglycdn.com/files/87552e7a-5018-45ab-84dc-884e66c32b61/jupyter_notebook_to_command_line.pdf
    • http://wutejaxevewef.myartsonline.com/chain_letter_book.pdf
    • https://uploads.strikinglycdn.com/files/f8f31802-a12f-4660-a72b-8c3e913d901d/mossberg_500_18.5_inch_barrel_20_gauge.pdf
    • http://xojasupolovoga.rf.gd/cisco_ccna_1_introduction_to_networks.pdf
    • http://kititone.epizy.com/bogukamusabiwotigaj.pdf
    • https://uploads.strikinglycdn.com/files/93fb9299-f921-4cbd-afad-cf25fc0d429d/3411477055.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea4a.bin
de4bee41867a936436d2c731e3e51325d94781d0bf3a769a9c49a6dc6a163a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 5420 bytes
font_01_sfnt_off0000fca3.bin
151ac45299cfb4937cce19be89c6cf9a2df344f8a0b2c3f3c3c12e22464f386c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 5832 bytes
font_02_sfnt_off00010fe2.bin
50bf506ad286450276a628e1e7bf80eef033d1803a7affa2d09be82f7d57f479		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE2 11260 bytes

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