Malicious PDF — malware analysis report

Static analysis result for SHA-256 3376c6d80b454ef0…

MALICIOUS

PDF

74.0 KB Created: 2021-03-21 22:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12e530700dd7401abb39b80042572986 SHA-1: b71cc02982eb71016c7ad78f2e0fb00e37edaa3c SHA-256: 3376c6d80b454ef097ec01a66335cb3b5c2485cf1f9ab2f6a2a86e55cef0173b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://jacksth.ru/award?keyword=2+dimensional+shapes+pdf', suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, appears to be a lure related to '2 dimensional shapes'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest it's a phishing document.

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://jacksth.ru/award?keyword=2+dimensional+shapes+pdf
    • https://cdn-cms.f-static.net/uploads/4486045/normal_60446d49ce58e.pdf
    • https://cdn-cms.f-static.net/uploads/4483842/normal_6019d621eee9e.pdf
    • https://cdn-cms.f-static.net/uploads/4377938/normal_6018d9e43c739.pdf
    • https://static.s123-cdn-static.com/uploads/4487903/normal_5fc5ead8e51bc.pdf
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fd165f50d9a4.pdf
    • https://cdn-cms.f-static.net/uploads/4452392/normal_603124b9d0336.pdf
    • https://cdn-cms.f-static.net/uploads/4483870/normal_6025ca08d7b6c.pdf
    • http://pisodanijuke.iblogger.org/sample_onboarding_template.pdf
    • http://bimonetejatoleb.mygamesonline.org/30611130107.pdf
    • https://static.s123-cdn-static.com/uploads/4388274/normal_5fd04fb899041.pdf
    • https://static.s123-cdn-static.com/uploads/4481423/normal_5fe1b8c76a6e8.pdf
    • https://cdn-cms.f-static.net/uploads/4470016/normal_60397e1b291bf.pdf
    • https://cdn-cms.f-static.net/uploads/4379034/normal_60103a8fd645d.pdf
    • http://potawuzaj.medianewsonline.com/video_games_advantages_and_disadvantages.pdf
    • https://static.s123-cdn-static.com/uploads/4421365/normal_5fcc3b27b058b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bibirosomuxir.epizy.com/19204946861.pdf
    • https://s3.amazonaws.com/fovezewi/pimubedikexobosamoduzok.pdf
    • https://s3.amazonaws.com/gajabedafot/sabobarulonul.pdf
    • https://s3.amazonaws.com/sugosubexez/blank_chatterbox_template.pdf
    • https://s3.amazonaws.com/tigewibejageju/gaxojixadusibugetosa.pdf
    • http://zuvuzevo.atwebpages.com/20180845643.pdf
    • http://kupikobu.epizy.com/acls_algorithm_2017.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_off0000e401.bin
e35584263813f72ce09fdf8bd55376d50db2b0398f9e8aa4533bf23012d57375
pdf-font-stream PDF embedded font (sfnt) at offset 0xE401 5224 bytes
font_01_sfnt_off0000f5a1.bin
d85c6be97091e88e4aaf1841d3a04ee4d9914b0087763cc22386ffa16598bcec
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 11000 bytes