Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6bd19d958618d71…

MALICIOUS

PDF

69.6 KB Created: 2021-03-28 17:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 096abe5feef544adde33ba92e09e6129 SHA-1: 7a8797a5e9584df27385b8504d0f0746f474b717 SHA-256: b6bd19d958618d71a241d86c40f598f0086f983eb755a38c9f2461f697548909
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, with the latter specifically flagging it as Pdf.Phishing.Trojan. The embedded URL `https://midufefew.ru/aws?utm_term=n3+electrical+trade+theory+book+pdf` suggests a phishing or malware distribution lure, disguised as a technical document. No scripts were extracted, but the PDF structure and heuristics indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/aws?utm_term=n3+electrical+trade+theory+book+pdf
    • https://static.s123-cdn-static.com/uploads/4393637/normal_5fe210e31f4d7.pdf
    • http://wonozudobitisog.scienceontheweb.net/fiwirarajakazivazex.pdf
    • http://fetedeju.mygamesonline.org/which_country_represents_babylon_today.pdf
    • http://zadamisofegeku.22web.org/boeing_787_cockpit_layout.pdf
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/xovemowefedo_vuliwukupifos.pdf
    • http://gegetamuwu.iblogger.org/52627820325.pdf
    • https://cdn-cms.f-static.net/uploads/4389601/normal_5fd6a6fc211eb.pdf
    • http://jalojewaga.mypressonline.com/how_to_print_photos_hp_envy_5055.pdf
    • https://fukidupedogof.weebly.com/uploads/1/3/2/8/132814182/liruporidejof.pdf
    • https://bufopavebusi.weebly.com/uploads/1/3/4/8/134853568/duxizuraxojopefa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nakirere.rf.gd/43897510353.pdf
    • http://lexireto.epizy.com/20777308842.pdf
    • http://kukipugewogedid.rf.gd/91627190480.pdf
    • https://s3.amazonaws.com/xeruxaxer/11742959470.pdf
    • https://s3.amazonaws.com/mogipegi/soundarya_lahari_meaning_in_kannada.pdf
    • https://s3.amazonaws.com/pavujiniz/delivery_receipt_template_excel_free.pdf
    • http://jabejanaboz.atwebpages.com/93037866116.pdf
    • http://datidalumoz.rf.gd/bsc_modern_physics_notes.pdf
    • http://xekujigifur.epizy.com/lelibemiwevosuxapigudij.pdf
    • https://s3.amazonaws.com/lumixi/43005866198.pdf
    • http://nixasosuj.epizy.com/burger_king_dollar_menu_nuggets.pdf
    • http://kageditivumimor.onlinewebshop.net/adverbs_worksheet_for_class_4.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_off0000d1de.bin
0a35c3d01fa648bb24446a7c58d1767fd1e7c412ad0a77a0309274ae70f477a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DE 5504 bytes
font_01_sfnt_off0000e49b.bin
482c2c2f078b5126cfd4b1e1b6305862dc2ceb473fb1a3867b91203b387c1933		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE49B 10500 bytes

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