Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53c340d124ace67…

MALICIOUS

PDF

73.4 KB Created: 2021-05-03 00:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4e15772234a53514b1bc0085bc433bc6 SHA-1: 9dfc41a92fbada36fb45924c3635e961d2d9780a SHA-256: b53c340d124ace67af34ba2991ff339d407eb894dfe606b8f9c715a7916dd359
96 Risk Score

Malware Insights

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

The PDF file contains a URL that mimics a search query, likely intended to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the overall detection suggest the document is designed to lead the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=how+to+delay+start+kenmore+oven PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fca5f8f4770a.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/how_to_calculate_redox_titration.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/how_to_sharpen_a_knife_with_smiths_stone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379369/normal_6000303d7729c.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/tonimide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427079/normal_5ff24a6b464ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_600aad8bb08e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464850/normal_60533d99936ce.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/principles_of_agronomy_sr_reddy_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_5fdc3f3beeef3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370744/normal_5ff8c7358cd47.pdfIn PDF document text
    • http://dipugipedanam.sportsontheweb.net/zubazazilufimuvudupak.pdfIn PDF document text
    • http://wusator.mygamesonline.org/povugavimifadawegugiviz.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/poxavatakij.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/neil_degrasse_tyson_quotes_the_universe_crossword.pdfIn PDF document text
    • http://pazolozul.mypressonline.com/berekazodafoxigomewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_4cce7fef78f744958d2ecee4533316ad.pdf?index=trueIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_2b63f7dbec2e409cbdd1feea0b7a2659.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_0413278be0bf4679a4760bd1bfd68be4.pdf?index=trueIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_a8f7c4eeb76845db9d00db70822a9eeb.pdf?index=trueIn 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_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 5252 bytes
SHA-256: e0979624b66cdbbb72a5eda8e746d1e9722662edc2fe75e54db52003dc973c4e
font_01_sfnt_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 10680 bytes
SHA-256: f3c9bc209a250db603318e93e6f2d886bf3dd7e9b5c8a3ae8d39edf94229c301

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