Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f665535a67e565a…

MALICIOUS

PDF

78.1 KB Created: 2021-07-12 21:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6291cf01156167da946921dfec2605d4 SHA-1: 767618c2e974aad56daa28e98c63c93e0b583f0e SHA-256: 3f665535a67e565a3c29e393f156956e792fb8896f3c3b447a4caeb8bff6451a
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 high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious website, likely for phishing or malware distribution. The PDF structure itself shows signs of manipulation with duplicate object bodies, further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8678

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://huntic.ru/square?utm_term=what+did+zach+do+to+hannah+in+13+reasons+why
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e84326ba193607d16c7aab/1625834278677/what_are_the_goals_of_psychological_research.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c1f0351081123f7b8ee4/1625866736506/24clan_injector_config_file.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8f47adefa333328a8943e/1625879675444/meaning_discernment_bible.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e87343b9ca6543b7ad4b7d/1625846595880/resugewapo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e850b59ce0113d451f5b00/1625837749328/zoom_g1on_manual_portugues.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7c5236e46386ca3bf70be/1625802019388/pricing_decisions_in_management_accounting.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7a70281471576eae9fd5d/1625794306986/sagafuni.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_off0000d089.bin
e0041d1574e84126bec1fabfa53059a5ad66a533f48e018aa72e112ecae68560		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD089 16404 bytes
font_01_sfnt_off0000fad8.bin
1529430f16ad03038601c163d89e8c955059d146184bb0c3c689f64fd9547384		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD8 10896 bytes
font_02_sfnt_off0001143b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1143B 16792 bytes

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