Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b9d9e52214abb0…

MALICIOUS

PDF

76.4 KB Created: 2021-07-18 21:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f884dae4fc3cfae4193e712baa026ca SHA-1: c92eb26fdbf4eec8a18dc18b15da75a513dfbb63 SHA-256: 44b9d9e52214abb0badcfab230e300c4ddb5b347ca9b10548d35655fa6700d18
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is likely used to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of an external URI and the high confidence detection suggest a phishing or malware distribution attempt.

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/NsX9ihectO0/square?utm_term=oye+lucky+lucky+oye+mp3+download
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f032953a4e3014a1c58273/1626354325409/miguramixej.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f028d20511021e70b72c84/1626351827058/77985189286.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3d5e07f94c710fbcb27d8/1626592736130/tidudezes.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7e796ad76c09748faa56/1626111610039/fraction_questions_and_answers_for_grade_7.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1feadd0cbc11ff8839e97/1626472109741/sfo_to_nyc_flights_today.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2a595d68f3225905196ba/1626514837375/29210316906.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f15276425b7b741787571a/1626428022819/nojonanagimilosilemu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e95b7b085b1c120f99f8d8/1625906043539/parabogozi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3acb280d83038fa86483f/1626582194725/asset_instant_write_off.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f076d33576e9290f944e28/1626371795253/89693589320.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f304a6783e880aac7b9977/1626539174595/subway_surfers_play_game_for_free.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee28e27d49fb55d6261b43/1626220770714/tobovojabatasatu.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_off0000c823.bin
b91c19962460842fdf8eaa8005c3b90d32aaf97fe0d9095a614f4329d0fe00a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC823 10804 bytes
font_01_sfnt_off0000e124.bin
2293922223f2d113c22964a29b1da5ea5c9d8c9ad853367f7c38fb7b3d12a43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE124 16840 bytes
font_02_sfnt_off00010d1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1E 16792 bytes

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