Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f4cbf370b79e2c…

MALICIOUS

PDF

81.5 KB Created: 2021-03-02 19:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60163920b7b08b7af904d3c4d93bcef7 SHA-1: 2a49bfd82ef1ce08a3b4a23898fe9f67383cea0e SHA-256: f8f4cbf370b79e2c8415f38d7f2e00ca65c6d2d42fc4a2501bcaf6346d37af7f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=why+aren%2527t+my+external+speakers+working+on+my+laptop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498376/normal_5fe627f6584a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448330/normal_600a50acb0e1a.pdfIn PDF document text
    • https://ziloboze.weebly.com/uploads/1/3/2/6/132683463/9968190.pdfIn PDF document text
    • https://xetasigebe.weebly.com/uploads/1/3/4/4/134443645/pofav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462350/normal_601f2aa9f2b6c.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/ii5lljf/tiles_3_game_online.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/luworizesupox/lanopinusum.pdfIn PDF document text
    • http://kixavukuwowaz.rf.gd/11475395572.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/how_to_adjust_stitch_length_on_kenmore_sewing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/carfax_accident_damage_reported.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_off00010280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 5604 bytes
SHA-256: 88d289098924f24e3f1badc6e9e8c39794376f9835c9081c9a38cef0c5a81d42
font_01_sfnt_off0001159f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159F 10340 bytes
SHA-256: f49887604f7d57c7d79551c275d692bb87acdefbe5eb934652e54cb48fc00949

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