Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0788d00aee0cbc9…

MALICIOUS

PDF

74.2 KB Created: 2021-07-18 00:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7a7c600b0bc06e945aa2ea9d23200a3 SHA-1: 5eb34c655be43a330883d8dd3b1b9f067233c518 SHA-256: e0788d00aee0cbc9d888175e3804898b63be13a81422e3113e59f9518ce2a7dd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to a martial arts novel chapter, suggesting a social engineering lure. The embedded URL points to a Google feedproxy, which in turn links to a Squarespace domain, but the primary maliciousness is inferred from the detection scores and the nature of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/~3/7R6buoffwiA/square?utm_term=god+of+martial+arts+chapter+114.2
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f080f10fcd175c503765ef/1626374385834/can_i_freeze_cooked_pasta_in_sauce.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8adcea68a15728979fe49/1625861582617/4065025483.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efd22649582827e2fbd603/1626329638869/fabure.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f20bd9591751629a3012bd/1626475481157/converting_locked_to_word.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f34718ebca9b5ae8ebd7c0/1626556184293/22848426154.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f028b6365a201d3c3b5c53/1626351798459/lowland_streaked_tenrec_for_sale.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0e85e5422dc4ac5c2d51e/1626400862847/churches_to_baptize_near_me.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f009a1bf9aec2111af7cef/1626343842034/i_died_laughing.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f329bd26c2747482dd91ea/1626548669970/how_to_find_saved_wifi_password_android.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0d67c425b7b7417813d9c/1626396285199/73687545244.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee611d2a4cda17626051b7/1626235165791/72_donk_for_sale.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_off0000c10d.bin
6bc1f7a5deeb9c416c50d146655a37ea4639b607cbe1dd2d0dd6f5f97e4a577b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC10D 11136 bytes
font_01_sfnt_off0000db2e.bin
c5a20ee6202003db18197d0ac431a29943711ba985588339eeb6d75e3e8f4d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2E 15452 bytes
font_02_sfnt_off00010303.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 16792 bytes

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