Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1b9e774e0c6116…

MALICIOUS

PDF

82.8 KB Created: 2021-07-13 22:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7e5a763ec6bf28cc571684ee499c229d SHA-1: e8488e2c014b3713d2f4646784a755e0c4e9c64b SHA-256: be1b9e774e0c6116ef6009e72c757f0e674a70d3c632660ee4d9cab9fcd59565
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI that directs users to a website disguised as a C++ online editor resource. ClamAV detected this file as a phishing trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the detection suggest a phishing attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5977

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://feedproxy.google.com/~r/sq/ugae/~3/1LSSs5qy-i4/square?utm_term=cpp+online+editor
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed94aa37bfc37e3c22664e/1626182826642/86079042490.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed2d97f67381323ef4c529/1626156439885/center_game_chess_opening.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec81c0947cc46ca1285ebb/1626112449046/59607183240.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c3146955380ad9e6d925/1625867028870/water_resources_engineering_notes.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed8ee1c439f8287166e936/1626181345887/small_2_seater_sports_cars.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_off0000cf0f.bin
0a679e237a8d5c21ed2100b0ef4ee9c4d413cc2ae7ee7da001b5960cec512d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0F 16976 bytes
font_01_sfnt_off0000fb49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 16792 bytes
font_02_sfnt_off00011360.bin
9345397b7e1760d9154489a5e523e0a22cdc6871f4a3c8bfc681e4c5dc859cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11360 10088 bytes
font_03_sfnt_off000129e0.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129E0 16144 bytes

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