Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ee07d3bcca81ce…

MALICIOUS

PDF

75.3 KB Created: 2021-07-12 23:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c991cc89c21ec40d5be95b7b1734ad49 SHA-1: 2afe0a1f9cf3089191626b99da8b9053340594de SHA-256: c9ee07d3bcca81ce030d01d9c0d2c2602c4cf4d8e3e8e2f554ef6852fa86fda6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains embedded URLs that, while appearing benign, are likely part of a phishing lure, possibly related to 'murder mystery 2 codes'. The presence of PDF-specific heuristics suggests the exploitation of PDF vulnerabilities or the use of embedded scripts to achieve its malicious objectives.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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://feedproxy.google.com/~r/razvivatel/yapz/~3/IdU8rIDf9lQ/square?utm_term=murder+mystery+2+codes+2020+april
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9414e58c6623f038359e8/1625899342491/back_and_biceps_workout_with_dumbbells_and_barbell.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec930c3080d76c7a5201e0/1626116876829/factorise_the_following_by_splitting_the_middle_term.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8b37827f6503cc8308d4a/1625863033017/27949888149.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8fc6cd1a1204f6c913f3/1626116038917/zogujejakenarinakoga.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e800649ebc0053f317f9d6/1625817188209/pioneer_sound_system_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BD 16792 bytes
font_01_sfnt_off0000ddcf.bin
005e0f311e636391247ddb8ed2a4ebcb3ffca9083af3eb8669f1a2b49f8ddfbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCF 16144 bytes
font_02_sfnt_off00010792.bin
3c179931871ffca1c22da271c3228a8edff177cc7bb6bfba5bc24d1c42e1c096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10792 11020 bytes

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