Malicious PDF — malware analysis report

Static analysis result for SHA-256 4409cb2fb6141802…

MALICIOUS

PDF

80.4 KB Created: 2021-01-10 01:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 16ffcc6e23975ac70c87182f6695ab86 SHA-1: 79620719f79d77df1ec1245ddba8164a8d8aab49 SHA-256: 4409cb2fb6141802cb76a69814df9989d7d11554f76fd69898dc4b1cd1867bcc
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'sheet music', likely intended to trick users into visiting the malicious URL for a phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=daft+punk+get+lucky+drum+sheet+music PDF link annotation
    • https://megogira.weebly.com/uploads/1/3/4/5/134590171/4192411.pdfIn PDF document text
    • https://site-1180896.mozfiles.com/files/1180896/plane_stunts_3d_impossible_tracks_stunt_games_online.pdfIn PDF document text
    • https://site-1171568.mozfiles.com/files/1171568/7544027418.pdfIn PDF document text
    • https://site-1178831.mozfiles.com/files/1178831/82218151488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5fda483ca907e.pdfIn PDF document text
    • https://site-1174503.mozfiles.com/files/1174503/sotafif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_5fc124335708b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/lubemafujo.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/zokivoridedazujati.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/77391354797.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/luzalolak.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/business_studies_a_level_notes.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB14 4424 bytes
SHA-256: 15508ee5b28902c7935ddb1eb0c9e96d132fc1a1a8194aa797f28f45faac0a63
font_01_sfnt_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 5732 bytes
SHA-256: 24cc7ac85cb5c5cbb5178a87eb79274c4ca3bfca27e62f3ec3980ffaea2f520b
font_02_sfnt_off0000fdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFC 5876 bytes
SHA-256: b3fcb8155a882d17161781aefb4a52cc425af15bb3ff76f0e8d924261d7d430e
font_03_sfnt_off00010cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEA 10928 bytes
SHA-256: cb153e1cd959a98e087178785b9f8bed90b2813e7fcac850ee378dfb647715e7

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