Malicious PDF — malware analysis report

Static analysis result for SHA-256 02879ea0f4d8ff37…

MALICIOUS

PDF

233.7 KB Created: 2021-02-25 19:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8fa1521048ec59671bf282d4b7ad7a83 SHA-1: 3869009620e47cc7583e869595eb9623ff0e93e4 SHA-256: 02879ea0f4d8ff37f10d55c03af9dfc1da0dec561b8fcd9ae2ec7d18f9c5915e
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though truncated, suggests a lure related to a 'pocket guide public speaking pdf', which is likely a pretext to direct the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://maypoin.ru/award?keyword=pocket+guide+public+speaking+pdf PDF link annotation
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/3187490.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/dugolet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_603500cbd49d2.pdfIn PDF document text
    • https://gugewixurot.weebly.com/uploads/1/3/4/3/134393699/nupel-marapetamaxe.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/2a561f4bb.pdfIn PDF document text
    • https://taretowixulu.weebly.com/uploads/1/3/1/0/131070971/redopuxosubaritonere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481663/normal_601b893260398.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/who_makes_the_best_portable_air_conditioner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367311/normal_5fcd50990142a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gakupoxefale.epizy.com/internet_security_ppt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/angeles_y_demonios_dan_brown.pdfIn PDF document text
    • http://bukogowimuko.epizy.com/lagu_la_isla_bonita_glee.pdfIn PDF document text
    • http://pujumek.myartsonline.com/50887381965.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/starbucks_french_vanilla_latte_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/bimogo.pdfIn PDF document text
    • http://bojogidolivowes.epizy.com/apply_for_us_passport_form.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003497d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3497D 5432 bytes
SHA-256: c99e67cef1008d93dd494fdc24390583e2a19cdc7095ea6d4d666dca88805b44
font_01_sfnt_off00035c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C13 11416 bytes
SHA-256: ef7e03cfe70cb3ef99cc8ef3ec399b5cc58317d8b968f08e0967f569b6bfcd14
font_02_sfnt_off00038331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38331 16076 bytes
SHA-256: 203d4b37a4e38e27beb61eda8a086780d66c2d6e76bef79543a4dcf8b77e3798

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