Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a243344bdfd9854…

MALICIOUS

PDF

69.2 KB Created: 2021-02-17 01:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5f352ab03b908e180b6ecc5fd93e1242 SHA-1: 99e9fca24a2d603b483ccaa2be894635cf925af1 SHA-256: 3a243344bdfd9854e121faeeeeec38607b3ba8aad09f735993c43dd6ce89bb13
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=what+is+a+girl+called+in+spanish'. This indicates the document's primary purpose is to lure the user to a potentially malicious website. ClamAV also detected this file as Pdf.Phishing.Trojan, further supporting a malicious intent. No scripts were extracted, but the presence of a malicious URL is a strong indicator of a phishing or malware delivery attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=what+is+a+girl+called+in+spanish In PDF document text
    • http://fetisaletom.iblogger.org/folukekewusipikademe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_6014a4d0d0e1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387704/normal_5fffb4deb3da1.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/he5BPD2/mindshare_definition_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/uP2jbsQ/color_replacement_photoshop_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/dhghjig/goat_sim_payday_secrets.pdfIn PDF document text
    • http://kakaxazirobolob.iblogger.org/76784833679.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/Eji2tmT/subscriber_count_james_charles_and_tati_westbrook.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/AhbXdih/poredovusovepera.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/mefonevimimix/antares_auto-_tune_efx_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/kujukozetad.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/nukapanowetulifowub.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_off0000ce39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE39 5348 bytes
SHA-256: 6629fe164a1c10b788fefc8a2e3168fe56679463526b9f09423f27aa8257f749
font_01_sfnt_off0000e06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06E 12816 bytes
SHA-256: 93112138e922e7b955f11ec7feeca195b5a32144120942ead41ef8058f39d6b9

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