Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aec360eeea5b45c…

MALICIOUS

PDF

85.7 KB Created: 2021-04-02 03:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b04b48780bcbf10c4357c493d049b1cc SHA-1: 7747a6c878e65b03919143b6a5a06c33fe5c0d4c SHA-256: 6aec360eeea5b45cbbe8b4f869296ac4084681ac3c88f20771ba80edba73101d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness, with the PDF_URI heuristic pointing to a specific URL used in the lure. The document body, though heavily obfuscated, appears to be related to the URL's purported content, suggesting a phishing lure disguised as an answer key.

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://ponafet.ru/wix?keyword=pltw+digital+electronics+1.1.6+answer+key
    • https://cdn-cms.f-static.net/uploads/4380858/normal_6050f586d16df.pdf
    • https://votopugukoz.weebly.com/uploads/1/3/5/3/135315446/ea842958e61f9af.pdf
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/84bc4697d316.pdf
    • https://xesuxikoju.weebly.com/uploads/1/3/4/0/134095833/1b3337e67e72cc.pdf
    • http://diporesorojina.scienceontheweb.net/mobility_scooter_battery_box_wiring_diagram.pdf
    • http://xalapuzim.sportsontheweb.net/project_report_on_financial_performance_analysis_of_a_company.pdf
    • https://cdn-cms.f-static.net/uploads/4393635/normal_60247a64a4969.pdf
    • https://cdn.sqhk.co/muzubasiwu/j9ie47T/61270940300.pdf
    • http://gesoxusem.iblogger.org/lufejadafuzevorar.pdf
    • https://cdn.sqhk.co/podadoxafa/jfrlijd/50489672995.pdf
    • https://cdn-cms.f-static.net/uploads/4403260/normal_601fe80e6727d.pdf
    • https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/4008832.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zadakirilavaru.rf.gd/norodalemadilefuzaju.pdf
    • http://nemebikox.epizy.com/4141084352.pdf
    • http://zedowep.atwebpages.com/english_alphabet_handwriting_practice_book.pdf
    • http://putotapuzavip.rf.gd/plural_form_of_the_noun_alumnus.pdf
    • http://mulagokonud.rf.gd/83149929666.pdf
    • http://zanulewetadom.epizy.com/vaxizipa.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b6.bin
5d8f273ceac2b70bb88023963ab7e84f9c780660c0e4cc5d854a775122bd5bb9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 5604 bytes
font_01_sfnt_off00010b01.bin
ba8d2bcf435f976490bb6123e741b571e2f1b332f22b3bee2dd4cddc5f14375c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B01 11580 bytes
font_02_sfnt_off000132ab.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d
pdf-font-stream PDF embedded font (sfnt) at offset 0x132AB 16060 bytes