Malicious PDF — malware analysis report

Static analysis result for SHA-256 7431bc09563c2459…

MALICIOUS

PDF

73.9 KB Created: 2021-07-15 18:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 057424a9b2f59fb873940d03209d3721 SHA-1: d3fdd4ce9d3c4bdb26153ad9dda12071f09b53bf SHA-256: 7431bc09563c2459a55830b35526164507708d18a6903addc5a60346a0ab0a83
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of the external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/square?utm_term=notoriety+meaning+in+telugu
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec952e69d4b63361487fa2/1626117422560/youngs_chinese_food_carryout.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecef556bb85f4a8d80916e/1626140501449/natalie_portman_and_jude_law.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed1d7daf55617121223270/1626152317490/tobaxerurulowemiba.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee4b8e537273346e30b411/1626229646269/rabajev.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed98772d9f403b5211334b/1626183799649/mtg_arena_android_review.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec939f58d864752e026aab/1626117024014/fogadipowebem.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7aed325441e1b3783a9ce/1625796307224/nigatijibaf.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_off0000c0d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D8 16792 bytes
font_01_sfnt_off0000d8ef.bin
ad15bb008d29627aa9c19fc02bef416b1716b7c34a0a450b6290bccb7c88c476		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EF 10472 bytes
font_02_sfnt_off0000f0b7.bin
66e10cd38f387bf429f33e17a526a7678956c555f5952d73ec673912fa6acdb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B7 16672 bytes

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