Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45aa18287de8193…

MALICIOUS

PDF

75.7 KB Created: 2021-07-13 23:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04aea1306da0c12b45c1ca9eda9b4097 SHA-1: 15f11e8db59ca56463b193eb132240fff6e8bc7a SHA-256: d45aa18287de81936c99fe4179d7a0fbe665aaf0ab739e4ba61469023d5cdcfe
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, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. No scripts were extracted, but the PDF structure and embedded URIs point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/hIkXU_AiHkM/square?utm_term=advisable+in+tagalog
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed278ef67381323ef48d16/1626154894502/orion_dna_manual.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ede275a50f6e33a3249d89/1626202741344/in_spite_of_having_meaning.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92438defa333328aa984f/1625891896975/answers_to_close_up_pics_level_5.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edb6c11a2ce466740e792e/1626191553331/simple_present_and_present_continuous_tense_exercises.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8458e85181504630bcc0d/1625834894935/maintenance_company_profile_in_word_format.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7f235c244202458b0e57/1626111779191/powaxit.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8a4b6f98f4246de3f4917/1625859254335/nadavolimi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e94e3d2dabf2723555c839/1625902653141/400m_is_how_many_miles.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8a65a6a023653f6c245b3/1625859674663/sweet_candy_camera_download.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8eeef566ded7d61aa9fe9/1625878255349/86935334321.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9222f83a7f26ecd1bf20/1626116642243/bachelor_of_engineering_in_tamil.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7f03d0153e73bf8b4e23/1626111747101/windows_7_kms_activator.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec87467726b430b4689b03/1626113862549/wetukesejafozalo.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_off0000c53e.bin
c70429f491fee564c007eaec29bf32be2630b4296f29ae8bbf88704995e99ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC53E 16800 bytes
font_01_sfnt_off0000f131.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 16792 bytes
font_02_sfnt_off00010948.bin
45b24d67fd6a7f0001f538d4844e24e9d36d39649868a0fbeec8d8d83c36334a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 10508 bytes

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