Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d22c6a2b46280e…

MALICIOUS

PDF

79.9 KB Created: 2021-07-12 21:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 363ee0a70e16e7cc0f0abd0ecb2ee985 SHA-1: e54752a70591ecd0745001e95cefab7f899e95ec SHA-256: b1d22c6a2b46280e04d6141e13ae1f26ed10fa1f15c148a59a4f7bb6f7e3a20f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The presence of an external URI suggests an attempt to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7939

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://crewmak.ru/square?utm_term=unit+probability+homework+4+simulations+and+predictions+answer+key
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e82e3dba333063f17bedfb/1625828925246/dosavu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e78cde4261ba79805cb1b3/1625787614038/placenta_is_located_anteriorly.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d100cf33f708d79b88c/1626111248803/nedodajimal.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8bf3154872c510b8e2cf5/1625866033146/82925714130.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e943c7c4c1a734c5d802a8/1625899976104/2009138445.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_off0000d1e2.bin
08e68f0953395bfacb2b7a89a73a5eee4f5432cb542930681708d910c7da8a16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E2 11396 bytes
font_01_sfnt_off0000ec70.bin
cb9f13167287d6fef8e905711b424335104df7b825ba5d34565f67b5aaca1c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 17008 bytes
font_02_sfnt_off000118c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118C7 16792 bytes

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