Malicious PDF — malware analysis report

Static analysis result for SHA-256 4448f5d81c544907…

MALICIOUS

PDF

75.9 KB Created: 2021-07-16 15:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9875e1a66ea34e5427ed9e070961d33b SHA-1: c1c022153d4e97d87e8c4b335c64277c4a8af8dd SHA-256: 4448f5d81c5449072ab212252cc33e7a489c5ec0912e241a567710b83478a8c2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that points to a download, suggesting it's used as a lure to distribute further payloads. While no scripts were explicitly extracted, the PDF structure and the presence of an external URI heuristic suggest it's designed to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/pL_UGxDroB4/square?utm_term=gta+vice+city+for+pc+setup+download
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0bf5de013e242e70e013d/1626390365476/59425363144.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9165c81c37306b2fc750/1626116453593/9701023254.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e789bf6e46386ca3bbc12d/1625786815777/proportionately_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed76728c96c6301f94fa87/1626175090816/pit_and_great_dane_mix.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_off0000c7bb.bin
ee7e8a11192b35d2782f6b55fe62fe91dff01500b68462291106d521aec25fb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BB 11020 bytes
font_01_sfnt_off0000e19a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE19A 16792 bytes
font_02_sfnt_off0000f9ac.bin
b4aa13c39317be0cefd85d42acc7cd5741cbc166bb8768639963964396a76fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 16300 bytes

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