Malicious PDF — malware analysis report

Static analysis result for SHA-256 612afc9f0a8226a4…

MALICIOUS

PDF

107.7 KB Created: 2021-07-13 20:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a57407dbbc39529e9a6e4671a082701 SHA-1: 0ce3f6e77dd828559b943a94d43f8b27c6614698 SHA-256: 612afc9f0a8226a4efcdd988da07897b8bc71614e058d5188453221b42f69161
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URI pointing to a URL. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. While the document body is heavily obfuscated, the presence of an embedded URI and the ClamAV signature suggest a phishing attempt to redirect the user to a malicious site. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier clean score 0.0587

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/-7-cX3opz_8/square?utm_term=ps2+rom+torrent
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9013b563c1506a8b4d06e/1625882940077/how_to_drive_a_manual_4_wheeler.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8d820c158db2a32dafdd0/1625872417029/identify_zeros_of_a_function.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d3f.bin
5a399f6b2043e094b50dfc1732372f2461d68cdba8afc402c2cc28793770bfd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3F 16808 bytes
font_01_sfnt_off0001690d.bin
52133c3d8809fe7645a5a37e732c9ab4cc48a5d8aab5484bab799de069c6769a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1690D 10088 bytes
font_02_sfnt_off00017f9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F9E 16792 bytes
font_03_sfnt_off000197ab.bin
f8e9284ce0bc5fe2efad1b6f61f760ea78df54b23bfb5b754a8083cc6e60c3eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197AB 2208 bytes

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