Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70f9be415898de2…

MALICIOUS

PDF

74.1 KB Created: 2021-07-13 07:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1cf8e1c2e102e5b0d08cc94cff8e807b SHA-1: 4f4c8dcdeb316dffb35adc675de1e4f138452de4 SHA-256: d70f9be415898de282343520a0f1a6a36854345806ad2095969bdaa8d7a79131
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure the user to external resources. The PDF structure and heuristic firings point towards a phishing or exploit delivery mechanism, potentially involving JavaScript execution within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7078

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/IdU8rIDf9lQ/square?utm_term=words+to+express+happiness
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecf2c2fc46f1629aff42d7/1626141378996/how_to_play_shadows_of_evil.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7c4c7a1add4dee1ed904/1626111052525/hunger_and_undernourishment.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7af521d61f435cef5951c/1625796434357/850_mm_to_feet.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8aa16f98f4246de3fd817/1625860631013/88533021271.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_off0000bf70.bin
eb1a7fe182844e0a496194b313990ae5761466dd61f3c68a1c2bff7518972368		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF70 16776 bytes
font_01_sfnt_off0000eb2c.bin
dddb53c89f3efcddef9a9a8765ff5a89cf86bdb95b6833f9efacd5460323db21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 10536 bytes
font_02_sfnt_off0001032b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 16792 bytes

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