Malicious PDF — malware analysis report

Static analysis result for SHA-256 81255ac09354266e…

MALICIOUS

PDF

77.6 KB Created: 2021-03-16 23:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d745052831a1302412b3162b3ca222fd SHA-1: 171b9c9de7dd3c894aa27139009520ca02e696de SHA-256: 81255ac09354266ea375376a9c2bc4080848e300350ad7d92fa324359466628c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, aiming to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=what+is+the+cost+of+a+psychological+evaluation
    • http://zumewidife.mygamesonline.org/69894409281.pdf
    • http://raxejudesezix.scienceontheweb.net/49416393709.pdf
    • http://solusaxisabo.scienceontheweb.net/biomedical_waste_management_amendment_rules_2020.pdf
    • http://kakorezikudu.mypressonline.com/61601112467.pdf
    • http://bukobaxaz.getenjoyment.net/menatuwikisaro.pdf
    • http://fullstacket.online/prefixes_and_suffixes_worksheets_3rd_gradedevpn.pdf
    • http://gukevipagopu.mywebcommunity.org/mobilcom_debitel_kndigungsschreiben.pdf
    • http://torchland.xyz/wujewosaxalimeweloxii715r.pdf
    • http://kidufamipowanot.mywebcommunity.org/3166723811.pdf
    • http://mosquito.codes/ethological_theory_of_human_developmentayx3l.pdf
    • http://tigibisolefora.mygamesonline.org/guia_turismo_pais_vasco.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jelunegizubu.atwebpages.com/toxoplasma_diagnosis.pdf
    • http://legukekujuso.rf.gd/nail_salon_near_me_open_on_sunday.pdf
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_40e4e9084e754173b92fa6d3adc2ad1a.pdf?index=true
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_468053d66dfe441ba47e8899d50ff67b.pdf?index=true
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_3d45e416fec94a86b66c9bb60709b285.pdf?index=true
    • http://tuwutexo.onlinewebshop.net/xamedojupufufugilofik.pdf
    • http://lanesoxulixag.rf.gd/yo_amo_a_paquita_gallego_capitulo_13.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e528.bin
045b12dfbb34cb30995425361a044d5f7738e5cd545c0d948d19befa73e070aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 5236 bytes
font_01_sfnt_off0000f716.bin
15f8160a0c04f6a018322e98d7d92fa5c730ab8e84a97b8700eb54cae7246bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 10876 bytes
font_02_sfnt_off00011bd7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD7 4324 bytes

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