Malicious PDF — malware analysis report

Static analysis result for SHA-256 41bb54070f6f1c7d…

MALICIOUS

PDF

79.1 KB Created: 2021-03-18 15:01:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af93e9bb4287d83e402ad849237f559d SHA-1: 7253fdfa6adeef53437b6f8120c81ef1548b390b SHA-256: 41bb54070f6f1c7d1fabe6a6909b2b59fd7f78fa195c1593e479fc66884593ca
96 Risk Score

Malware Insights

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

The file is a PDF document 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 trick the user into downloading further malicious content or phishing for information. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=toyota+recall+case+study+pdf
    • https://static.s123-cdn-static.com/uploads/4380393/normal_60031fabbefb3.pdf
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5fd042bd55d7f.pdf
    • https://static.s123-cdn-static.com/uploads/4489834/normal_60013a2a46113.pdf
    • https://static.s123-cdn-static.com/uploads/4374189/normal_60032c70ab56d.pdf
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fe12bd0eec2d.pdf
    • http://fosavaxenu.mypressonline.com/there_is_there_are_worksheet_islcollective.pdf
    • https://cdn-cms.f-static.net/uploads/4414176/normal_601dd934b4303.pdf
    • http://pidagenavuziw.mywebcommunity.org/bulletproof_diet_book.pdf
    • http://good-production17.site/xirawexox7upu.pdf
    • http://moxegelubopidi.sportsontheweb.net/duvonisipasanavevitifiwof.pdf
    • http://gavediteriremuv.medianewsonline.com/price_kx_tg3411.pdf
    • https://static.s123-cdn-static.com/uploads/4385230/normal_5feef4b8ecb56.pdf
    • http://fabermanufacture.ru/resumen_del_libro_el_principito_capitulo_11uubwu.pdf
    • http://supernefritroller.xyz/sapazazamojujupuronijxa75x.pdf
    • http://modernstyle.pro/szckte_anlam_zml_sorularrxpi0.pdf
    • http://frontglass.xyz/870766994529rk5u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fadadedezeker/asymmetric_warfare_tactics.pdf
    • http://mozaninukokefef.onlinewebshop.net/ap_finance_budget_2020_20.pdf
    • http://kikukuvikato.myartsonline.com/50604006095.pdf
    • https://s3.amazonaws.com/mubemutolewe/aggiornamento_windows_10_gratis.pdf
    • https://s3.amazonaws.com/doxifuba/bimen.pdf
    • http://vexabimumemig.atwebpages.com/internal_combustion_engines_applied_thermosciences_3rd_edition.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_off0000f745.bin
ee3a160c0f8fd52e9e6ecc9002fb7f62caa8c9747dcb618b70201cf677d69009
pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 5200 bytes
font_01_sfnt_off0001090d.bin
76b2c429a79f40b65dc03814d46a527ca586993c0efba98a32b1cc5ff1dc92cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 11532 bytes