Malicious PDF — malware analysis report

Static analysis result for SHA-256 924ad62272254a32…

MALICIOUS

PDF

80.5 KB Created: 2021-07-16 11:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f067be3eea722f56938ceb600cf65f73 SHA-1: 32d828e2cb9b66134a010405ae4f6731c5943b23 SHA-256: 924ad62272254a32594b7ff0d214dc060528ec625c127c1a34a7c51872591cd4
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 and the PDF structure suggest it is designed to lure users into visiting malicious sites or downloading further payloads. While no scripts were explicitly extracted, the PDF's nature and heuristic firings point towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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/razvivatel/yapz/~3/-MXWpcYQ7kA/square?utm_term=santaclaus+is+coming+to+town
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e87a02534f415977bb2cef/1625848322669/the_heat_of_neutralization_of_hcl.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee7fc70b33b63bb8c9c9e7/1626243016034/bsc_tuition_near_me.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e932ab2c5c2f6215c9a143/1625895595344/a_nasty_deal.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_off0000d9fa.bin
378f3a496cfd1d2eccf7a87af1ae1f6044735a69acf2f44ce7f1950a343bae8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 10600 bytes
font_01_sfnt_off0000f23f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF23F 16792 bytes
font_02_sfnt_off00010a51.bin
ed48bd84808e85d06ac186f3afac79e74d0991640bc90ad37dff53a155df6402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A51 16928 bytes

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