Malicious PDF — malware analysis report

Static analysis result for SHA-256 da772d45cebed84c…

MALICIOUS

PDF

77.5 KB Created: 2021-07-18 09:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26dd347a7568de2183485de11c168d4c SHA-1: c30fff8cda624ab2c84acafd5be8afab455637cc SHA-256: da772d45cebed84cf0945871080d6dc1cdb7abedac11a483df88f4cbd94ee969
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. The embedded URL, disguised as a system requirement for 'Ark Survival Evolved', is likely a phishing lure to redirect users to a malicious site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9001

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/razvivatel/yapz/~3/v-xubMviL4Y/square?utm_term=ark+survival+evolved+system+requirement
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f27fb51db272198f8e6ecc/1626505141180/nemobise.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f018cd16a6d35a1113ee2d/1626347725956/71577235561.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec88ad4027437375970aee/1626114221198/kiss_me_there_she_goes_version.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e78e9e6e46386ca3bc0938/1625788062994/78887948914.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8e6c05183b3b579e1eea/1626115692632/one_clue_picture_crossword_answers.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_off0000cde8.bin
9e7a60bd5cba0311d1fa2b9adb4dd5a24867c904be2fce358921a734c6702015		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE8 10908 bytes
font_01_sfnt_off0000e6f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 16792 bytes
font_02_sfnt_off0000ff0b.bin
93b79ee342dbb8d520361eea825bf3f797ccf9a0514effa7698328a52e55e0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 16468 bytes

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