Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9827cb165add779…

MALICIOUS

PDF

72.7 KB Created: 2021-07-19 16:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad39f1cc61ccb21e6269bd1a737ff47c SHA-1: 73ee669d3450e107029a17490eba39b831228319 SHA-256: f9827cb165add7798d48604ce08beaf8b86caf4b6491d62931488127c6562329
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. An external URI was found embedded within the document, pointing to a suspicious URL. While the document body is heavily obfuscated and unreadable, the presence of the embedded URL and the detection results strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

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/X6hrLWyzjlw/square?utm_term=new+south+movie+ram+charan+2020
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f05edc7d31e3667f6e0e60/1626365661125/who_is_the_best_pokmon_in_the_world.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1b11efb2242485d9f454a/1626452254347/75104603612.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec79920d838b6c850bcd2e/1626110355102/busetizenevusetawoxobu.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7fa4986d8930991a784cd/1625815626100/when_does_independent_assortment_occur.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_off0000bc2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2F 16792 bytes
font_01_sfnt_off0000d446.bin
487cabb7773769dc38de26467b18761a5e07da78fffcc2f97372c9ae2cea68d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 10920 bytes
font_02_sfnt_off0000ed8c.bin
ce4b049afc69eb6d50f4d765b61c889b816287c80dd34ff723ed4ff3e363c800		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 15984 bytes

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