Malicious PDF — malware analysis report

Static analysis result for SHA-256 efab966b514b6f73…

MALICIOUS

PDF

86.7 KB Created: 2021-07-19 09:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 599c9530c94778339480e24afcfd7c80 SHA-1: 84bc0bfb708668edc7710bbcfbf9130100d69076 SHA-256: efab966b514b6f735cd28e31cc9ae6894b6ab51af3c71f67399038eba68f3d3d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded URLs, one of which is a feedproxy URL that could be used to redirect users to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of embedded URLs and the high risk score suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/sq/ugae/~3/0YvHz_IItD0/square?utm_term=happy+birthday+sister+song
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e77649ed8d191f65461017/1625781834058/nasikalijezizevosulilez.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92627787dde1a90ae2557/1625892391155/84047754013.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee3c12e03b615e098e0c46/1626225682930/scarecrow_song_ocarina_of_time.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e798e348fdc259403d030e/1625790691782/save_to_iphone.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e817ffd93aeb546a16fdca/1625823231654/biodata_performa_for_marriage.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee82d6bb85ab7f02c0c547/1626243799147/fibapaj.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f394fd699a8678c57e2e2b/1626576125319/wunatefagotagetibulonepo.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edb233151a035e9e7dd8cd/1626190387425/midokavonupoxusufe.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed5f44ff6d86145b9f9872/1626169157136/12381034938.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8cea85ef51a130ea07773/1625869992073/convert_to_word_pictures.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78a5760c9e2bcf41e387/1626110117970/51922110486.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f506246d5e991e36f4a408/1626670628991/widosimozoxosevedagex.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efe7b21fe2fc56fbe48ab6/1626335154365/how_many_pints_are_in_7_gallons.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed9c175dd1eb1c29069784/1626184728102/37836809092.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_off0000ef3d.bin
8c95c6ec65ec40d793a9987aecbd37a000f8b2aa1153babe9f5cc02bccd6fadf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 10868 bytes
font_01_sfnt_off000107d9.bin
d945c83ec9c386e54af0538b5500ad38fa56d334490a15bf01bf3d0eda5caafa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D9 17292 bytes
font_02_sfnt_off000134d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134D7 16792 bytes

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