Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56b017359386eef…

MALICIOUS

PDF

81.0 KB Created: 2021-07-19 00:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbfc8563b7cfd8198f72630558d589f5 SHA-1: ceab6f826414fe1e166027ec81debbfa8258f2ba SHA-256: b56b017359386eef84e95a6f485d360e79845d3461e3402093d66f3e91a5acaa
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of embedded URLs, despite some being confirmed benign, suggests an attempt to lure the user to malicious content. The document body is heavily obfuscated and unreadable, indicating a likely attempt to conceal malicious content or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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/kVSxLQpkboc/square?utm_term=fig+and+brie
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0da00311eab0d81a7bf4e/1626397185185/duke_of_kent_related_to_queen.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8174f8ad60325f0c8aa6a/1625823055774/yam_meaning_in_kannada.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec79990cf33f708d795f0c/1626110361617/61660941257.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edc967a9d1f62037e07b25/1626196327356/real_estate_appellate_tribunal.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ecd5997fcaa334213189df/1626133913747/he_man_have_the_power.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2b5da9c57c24939343b35/1626519002855/20151111524.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f03d628fff8309febce498/1626357090756/quality_of_life_dme_group.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f233fa8c10a93e5041865e/1626485754939/79468698210.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7b93e4aaab0286a890c10/1625798974778/23823198852.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_off0000db7e.bin
47e6620bc54c7198101d9cf3d890835f14b1d4d4c649876fff22c3f2f7bd709b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 17096 bytes
font_01_sfnt_off0001085a.bin
546c8f89a4b1df77a4ea85a5c8229642bf033a08c8ea8a80d7de59fe49527356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1085A 10108 bytes
font_02_sfnt_off00011eb6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB6 16792 bytes

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