Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90507175207abfa…

MALICIOUS

PDF

81.7 KB Created: 2021-07-17 06:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17c372f2f3d7b6809e601880d494057a SHA-1: bf42fa2c3c4cd7296a89699d9654defc642584ad SHA-256: d90507175207abfad251c6ccf6d1b599e8b7bff33a7a718a75d678987b258f90
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains embedded URLs, one of which is flagged as potentially malicious by ClamAV. The ML classifier also indicated a high probability of maliciousness. While the document body is heavily obfuscated, the presence of these URLs suggests an attempt to redirect the user to a harmful site. No scripts were extracted, limiting the analysis of specific malicious behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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://feedproxy.google.com/~r/sq/ugae/~3/UQ8tT55rDuk/square?utm_term=how+do+i+create+a+pdf+from+word
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f09fc26b8ee93c7cc7d088/1626382274420/play_pokemon_xd_gale_of_darkness_online.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e932c9aa30721e65efbcac/1625895625704/copyediting_and_proofreading_services.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee5b436d75c50a5d45d07d/1626233667670/fast_and_furious_8_tamil_movie_download.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee03632799685454fd4592/1626211171970/right_there_video.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_off0000dd1c.bin
1463968833bdf1bf78cf09bf01f9394093cca8517fa9c9865734956e3b53429e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 16996 bytes
font_01_sfnt_off00010924.bin
c2528ee825e608596338848a68e90c9405aa303b5ca89e1ddb737d7649bf8859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10924 10540 bytes
font_02_sfnt_off00012130.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12130 16792 bytes

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