Malicious PDF — malware analysis report

Static analysis result for SHA-256 010aa381ceb6989f…

MALICIOUS

PDF

73.6 KB Created: 2021-02-18 01:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a0e42836dbef3f6aedc9bea3c62b23d2 SHA-1: 422f4d5bde159b8f7f9047a93d73eb7e7efac89e SHA-256: 010aa381ceb6989f35d465f8053dfab53610e5a773fb4c56224861a9417a8ae5
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://seumenha.ru/123?utm_term=don%2527t+rest+your+head+character+sheet', which is likely a phishing lure. The document body, though heavily obfuscated, suggests a theme related to 'character sheet' and 'wkhtmltopdf', indicating an attempt to disguise malicious content as a legitimate document. The presence of multiple unknown URLs further supports the phishing and potential malware distribution intent.

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://seumenha.ru/123?utm_term=don%2527t+rest+your+head+character+sheet PDF link annotation
    • http://myirn.icu/home_design_3d_paid_by_uu70bue.pdfIn PDF document text
    • http://feedbacrnz.space/59808005310fz1b.pdfIn PDF document text
    • http://ziwixan.iblogger.org/kofibubifaredaraz.pdfIn PDF document text
    • http://remontlegko.info/cvc_words_printable5tou6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5fd0644452edf.pdfIn PDF document text
    • http://korsabarca.com/management_accounting_vs_financial_accounting1rxo6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375075/normal_5fed4998c788d.pdfIn PDF document text
    • http://cartest.pro/create_gaming_logo_templater09mg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivuxo/innisfree_sheet_mask_manuka_honey.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/dekofugesenozesoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/29799447024.pdfIn PDF document text
    • http://guwivuvasexi.epizy.com/esl_printable_worksheets_sports.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/betamawuguzalalemuwarebax.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/raluvelojobopepusel.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/appvn_apk_minecraft_pe.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/58543166686.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_off0000e3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 5132 bytes
SHA-256: 596e5f6ef4cbf2fb6703cf6db40507ded010eb623ac5490e3a4e3c17ba8f84b5
font_01_sfnt_off0000f535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF535 10656 bytes
SHA-256: 84dbfc19973ef5469eb7e69a9f32f796ec3cc674f2903e48e700ea7d6bd0a471

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