Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c8f70dcd518288…

MALICIOUS

PDF

75.3 KB Created: 2021-05-16 17:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4a97df0e9fd5911bfbc6f0bb2fe68fd9 SHA-1: 72c5c6ac4c74ead6252c491e90e705b91888d4a7 SHA-256: f3c8f70dcd518288608ae4b706a0ff54cfaae03c602732b38a010eb9ae74b9f5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high probability of malicious intent. The document body, though partially corrupted, suggests a lure related to team leader duties to entice users to click the malicious link.

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://golowaki.ru/strik?utm_term=what+are+the+duties+of+team+leader PDF link annotation
    • https://cdn.sqhk.co/mudonisogub/ajj0Cif/17629641335.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/hhhKhbl/slow_motion_editor_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_60473d8e3387b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403537/normal_60032d2e3045a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5fdfb796001a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_6031505426e95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408718/normal_5fe2a3fe6240c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_605ca9106d080.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/ggjgcym/tetutevilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_60364ca00f454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452169/normal_5fd34b9900aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_606ca115c3500.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/9Ijg6YT/galaxy_endless_space_shooter_sky_shooting_games_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_605db8fe80592.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gurunetotej.rf.gd/behavior_analysis_book.pdfIn PDF document text
    • http://godawawisegi.epizy.com/gerresheimer_annual_report_2017.pdfIn PDF document text
    • http://gamadajizi.rf.gd/advanced_data_structures_and_algorithms_in_tutorialspoint.pdfIn PDF document text
    • http://fiwixowu.rf.gd/piriformis_muscle_compressing_the_sciatic_nerve.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 5160 bytes
SHA-256: 937706d1d3f03fc4a7295a4aaad2daa252c18af741753f33616192ae661bcb9f
font_01_sfnt_off0000fbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFA 10560 bytes
SHA-256: 343acf60c37bbbf2e343bd893e95252d04021bdb44e1e73259bb96b42ee46f0d

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