Malicious PDF — malware analysis report

Static analysis result for SHA-256 75250f168c9d9f00…

MALICIOUS

PDF

73.2 KB Created: 2021-07-14 04:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b9433ab6df13522213465b53d132af41 SHA-1: 8cdc0f9a4a7f468a86821666ef788a243c17856f SHA-256: 75250f168c9d9f0094b4c4ea42f8c1be3588208c524a4f88173d7dd1afb204ee
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. The PDF structure and embedded objects are consistent with techniques used to deliver phishing lures or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/qQn0o4eTdIQ/square?utm_term=how+do+you+know+a+solution+is+saturated
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0abe115d504d3a8246f8/1626213054542/christmas_flower_coloring_pages.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8c0293601b306b46f9e9c/1625866281879/90841300893.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eca7b245711547b6a9d840/1626122162324/telufanegot.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee1b5833d4654651bacd7c/1626217304607/loan_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec792cfa40056e74d12fc0/1626110252263/vetoxiwakokonisarakuka.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7d5fa46a8e17713e478e7/1625806331022/computer_organization_and_architecture_mcq_question_bank_with_answers.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8dffe83ae0c4902358bf1/1625874430756/discuss_everyman_as_a_morality_play.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee1644537273346e2c9be3/1626216004812/52733467074.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8d92a78606b4d18578b59/1625872682561/48855963499.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c03561416537893fda92/1625866293289/airforce_group_y_medical_assistant_syllabus.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_off0000bdc0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC0 16792 bytes
font_01_sfnt_off0000d5d2.bin
84f2a778bf2d3148cb9463caa840c39e381f6eab3e04299854160e31d24bb44a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D2 16196 bytes
font_02_sfnt_off0000ffe6.bin
5e7754b1accf6972c2546261c15cc4b99990302151e0613f3ba2660db0e9cea1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 10624 bytes