Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fb799eef9585f0…

MALICIOUS

PDF

76.7 KB Created: 2021-07-13 20:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60596d46d53c8965530332368903f8da SHA-1: 29f19989b7fa2f90c9aed0ff7686e1d127fa91be SHA-256: 50fb799eef9585f001b8e3ac727864095e5e8febd57fe7382ea9ce4315b00ebf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of the external URI is a strong indicator of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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://synerhu.ru/square?utm_term=how+to+get+marker+out+of+the+couch
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c8c13add050c1b4b6405/1625868481454/firbolg_character_creator.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92f8b37cb9044756076e7/1625894795965/bowame.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca97a9a1cf201f808912c/1626122618240/78952649724.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec897254a52c186ce5a7f2/1626114418857/giwukijatizasavutepudesig.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecaaf5831aaf5e928e1274/1626122997195/your_appeal_for_disability_benefits_is_currently_processing.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8665765512e62108ce528/1625843287310/list_of_secretary_general_of_united_nation.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca64997282d6f46938c3c/1626121801475/pibimotarovexe.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_off0000ccd9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD9 16792 bytes
font_01_sfnt_off0000e4eb.bin
ee322ee889283f515ab6bb73de5773e0d4289c8fd35768ba13723c5a9e1bfba8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 16040 bytes
font_02_sfnt_off00010e56.bin
f24bd651883888c652dbef988308264e5a5f282df6311da050321d7041dd228b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E56 10644 bytes

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