Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3405336e8725e6b…

MALICIOUS

PDF

82.9 KB Created: 2021-03-27 23:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 123805dffa79736c469fdd6275194e29 SHA-1: 930b640ed317d949ac27b4ce487424abf704e7db SHA-256: b3405336e8725e6b9ea55e9793efc670b2214beaacdb471468885d9c69cf4fdf
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, appears to be a lure related to item valuation, consistent with phishing tactics.

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://pelibifir.ru/strik?utm_term=how+much+is+a+ds+lite+worth+2019
    • http://sapapubusil.22web.org/vorabugoguxewi.pdf
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/3032982.pdf
    • https://static.s123-cdn-static.com/uploads/4463543/normal_6005c3b07962c.pdf
    • https://cdn-cms.f-static.net/uploads/4375088/normal_6046f7ca7211a.pdf
    • https://static.s123-cdn-static.com/uploads/4382965/normal_6004b81e3323c.pdf
    • https://static.s123-cdn-static.com/uploads/4366406/normal_600120de82567.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nawonuzegajosi.epizy.com/88397005428.pdf
    • https://uploads.strikinglycdn.com/files/df5eb17d-7ce6-494d-bc61-5e069edcd047/gonelizeluduvanunuxavof.pdf
    • https://uploads.strikinglycdn.com/files/5a963c31-7d52-4e58-96a2-1c99bdd5f227/articulo_424_constitucion_mexicana.pdf
    • https://uploads.strikinglycdn.com/files/55b778a4-8bdb-4873-92f8-d65525e4aa86/trs_retirement_illinois.pdf
    • http://karapazixegipi.epizy.com/three_interesting_things_about_yourself.pdf
    • http://nivemegasewokem.rf.gd/mepigevajonenesirozisiwa.pdf
    • http://xugekevilop.rf.gd/puducherry_tourism_information_centre_white_town_puducherry.pdf
    • http://diwedixeku.rf.gd/80_diy_king_size_platform_bed_frame.pdf
    • https://uploads.strikinglycdn.com/files/ff563dd6-4da3-4c8f-8df4-c487fe2f6204/how_much_is_a_schwinn_frontier_bike_worth.pdf
    • https://uploads.strikinglycdn.com/files/bc9e8575-80c9-4a38-b184-712146624fce/how_formative_and_summative_assessment_help_teachers_in_tracking_progress.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_off00010304.bin
2ebf0d1ea6cd4a015dc642b23ba63a2bf5e2283f5eb378254f928ecda67a4e82
pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 5712 bytes
font_01_sfnt_off00011652.bin
a2978a49b7172f162ea7333330e4c8f458581ecefeec49de731c36e3fba5e3df
pdf-font-stream PDF embedded font (sfnt) at offset 0x11652 11516 bytes