Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e178bc2574d8549…

MALICIOUS

PDF

74.2 KB Created: 2021-07-12 20:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aaaebc8c4b7a05ff54221bc4519a9091 SHA-1: 1a8720f2f35bafc7eed9b33b5810c9e4cfc83be4 SHA-256: 8e178bc2574d8549248bec97044fe590199b919599f9bec97a670e3433e1e153
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'smidgel.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI indicate a malicious intent to redirect the user to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7882

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://smidgel.ru/square?utm_term=lesson+planning+with+purpose
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7b2498f757b1ac44f51f5/1625797193984/10_things_i_hate_about_you_dance_song.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7a302a431ed42d2f8b2cc/1625793283008/11853279134.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c9b9c5d9771337091a3d/1625868729826/jejigonagavidokalunawo.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7999181ab8d1aa9db22ec/1625790865129/zesim.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_off0000c49e.bin
eaf46a940383103015724a96cabfecbdda3852a58aabf0d51fb27eb2868bae73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC49E 15628 bytes
font_01_sfnt_off0000ec7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 16792 bytes
font_02_sfnt_off00010494.bin
7d9a6cfaa1bb749e4c7091716fcc1256b6f9db613e6c7effcb639d26142369ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10494 10672 bytes

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