Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f346511dc7849a6…

MALICIOUS

PDF

77.6 KB Created: 2021-03-30 17:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be83ffe7ad5951b25baff0ca294856dd SHA-1: 2a39228edfa47150328f4922342c3df430167d7d SHA-256: 9f346511dc7849a6d73cc9c53fba57b3f8bf019b4ce7ea5e82916c575c8354ea
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to accounting problems, aiming to trick users into clicking 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://bologen.ru/award?keyword=accounting+equation+problems+and+solutions+pdf
    • http://nutristrike-shop.ru/732521816212kcux.pdf
    • https://cdn.sqhk.co/mudifuto/0iaheii/44563969053.pdf
    • http://xonajolonifimo.22web.org/naming_binary_covalent_compounds_worksheet.pdf
    • https://cdn.sqhk.co/xugiwatokax/h8hjQhb/donanukepolizatabodu.pdf
    • http://smeh-mif.space/95398011131dze3l.pdf
    • https://cdn.sqhk.co/bisuligiga/bVjfdjc/photo_editor_online_collage_pixlr.pdf
    • http://padojuputiki.iblogger.org/mijewumijek.pdf
    • https://static.s123-cdn-static.com/uploads/4372721/normal_5ff78816aa656.pdf
    • https://cdn.sqhk.co/rekewuneboxu/dLbjbid/39207712246.pdf
    • http://beremoter.online/52181031544tbzvd.pdf
    • https://cdn-cms.f-static.net/uploads/4378161/normal_600ea7184f3d5.pdf
    • https://cdn-cms.f-static.net/uploads/4461245/normal_6033eea8b05a2.pdf
    • http://bufo.online/41919892921xh9py.pdf
    • https://cdn.sqhk.co/doginifa/Oyqgegf/home_remedies_for_upper_arm_muscle_pain.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wamexatigogov.epizy.com/analytical_geometry_grade_10_formulas.pdf
    • http://fejusadifidexi.epizy.com/autocad_map_3d_2009_crack_free.pdf
    • http://verirajoxa.epizy.com/canon_lide_110_toolbox.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_off0000eee3.bin
fc2aede6643f2bfd59e7ec807c26b4d3ac5acf535a63c8c37aaa981293589907		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 5732 bytes
font_01_sfnt_off0001023a.bin
b582362d690970bd35f3db359c4f67d16c625cc04fe003289e9f5fe3b179529f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 11560 bytes

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