Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b97172128e1405f…

MALICIOUS

PDF

84.3 KB Created: 2020-12-26 01:39:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8fb581c03609dfe20e677c41f812634c SHA-1: d1f6156fcef9f962785c8a0ba8daab7911af4309 SHA-256: 2b97172128e1405fbc80153b1d3c135b60bfe8443374b74021a388ffc8b0e356
96 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing attempt. It contains an external URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to free sheet music, which is a common tactic for phishing campaigns.

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://traffset.ru/aws?utm_term=free+printable+clarinet+sheet+music+pop+songs PDF link annotation
    • https://cdn.sqhk.co/ritafase/ijgggd0/baby_ducks_for_sale_in_texas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489264/normal_5fb77700bb8af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427085/normal_5fb4e6961fe41.pdfIn PDF document text
    • https://cdn.sqhk.co/kezulegol/Ohh8sih/logo_superhero_wallpapers_for_mobile_phones.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376856/normal_5fcf86f9280b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450636/normal_5fceb5e4def96.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/RZ9Wb56/luvok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483873/normal_5fde9e11e111a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fe3568bde4b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06aa2f80-5660-43f0-a7c1-7f5125c79bf3/wasosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f1c7ea-8724-44f1-9f75-3d503acff8c5/wuwekewojil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9ef6d1-7012-4ab9-a597-41be4d072fca/32719777417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94fe229-347c-4794-83f4-b86354b3fb8e/kimberly_high_school_calendar.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_off0000f73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 5444 bytes
SHA-256: 2d98a13ec2aef63a604f2c31772ac928d97ae77a6ffc4fdf50d19a6978ace465
font_01_sfnt_off00010993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10993 10956 bytes
SHA-256: ba8a672419d02424e84eb2bee40f36591b8e78461aa32c9f999edc4c139fdf3e
font_02_sfnt_off00012eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEF 16100 bytes
SHA-256: d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6

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