Malicious PDF — malware analysis report

Static analysis result for SHA-256 c389ffc430d2d8c7…

MALICIOUS

PDF

75.6 KB Created: 2021-02-18 15:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c8aa9a783e371912a1c7f33ef9aaeac SHA-1: 1f8e672a102f0c223200d38f6cd50fc606b74e36 SHA-256: c389ffc430d2d8c735a8cea194aceea24afd2bd604e538bd55b35ebaeec9c14e
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to deliver a malicious payload or phish for credentials. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=mew+mew+power+games
    • https://refiraledekire.weebly.com/uploads/1/3/4/7/134715744/puzebuvidosidaf.pdf
    • https://sesanejaw.weebly.com/uploads/1/3/1/4/131407178/851cf.pdf
    • https://cdn.sqhk.co/tefupudoma/ihhgeki/digical_calendar_1._7._1_apk.pdf
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/lexuz-wajufuwole.pdf
    • https://cdn.sqhk.co/niturunajik/QQPegfE/xakajuzawixeludeger.pdf
    • https://cdn.sqhk.co/delojiwuguj/5gcZ0gn/2346549535.pdf
    • http://sdfsdfsdf.shaketorch.com/background_images_hd_1080p_free_car.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pelatutokutemi.epizy.com/10522046651.pdf
    • http://fudogupadi.rf.gd/35429666906.pdf
    • http://vudexejuvejutek.rf.gd/cadbury_report_1992.pdf
    • https://s3.amazonaws.com/purixifusipelid/23248063610.pdf
    • http://lelirovosas.epizy.com/21846205505.pdf
    • http://fizufanotujo.epizy.com/weaning_from_mechanical_ventilation_guidelines_uk.pdf
    • https://s3.amazonaws.com/rodakarugupoko/compassionate_appointment_application_form_for_andhra_pradesh.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_off0000eb04.bin
8a4a7bf2efc43f9d9009d76f4834b2f367026a4deddee52472b27d26f7d8f6d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 5204 bytes
font_01_sfnt_off0000fcbb.bin
1ac3f88797c406e19dec968251dc470d2aeae0f8d3c8c394bc464df67defade2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 10776 bytes

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