Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f5ca72d48b1834…

MALICIOUS

PDF

75.2 KB Created: 2021-07-16 07:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 957b3a4e4a4ca97aa35c42b39c4d6d26 SHA-1: 808505a07c041cda779318a09b5436cbb2039852 SHA-256: d5f5ca72d48b1834cea7f25020695169354976aed68946ddbaa2571f28672428
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to direct the user to external resources. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall context points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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/NsX9ihectO0/square?utm_term=image+to+pdf+converters
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e804ef5eabb22f35dc5237/1625818351269/47817817540.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0b4cb5422dc4ac5bf1a28/1626387659789/sokuvaw.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8ace20781e4bb11cae8d/1626114766394/exercise_on_verbs.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edaf1bc2b60e0ed5b67df0/1626189595920/75882052226.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed909236a7a57c1cf4f807/1626181778724/female_muscle_growth_transformation.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0fa966186c4310040da7b/1626405526980/the_science_of_learning_and_the_art_of_teaching.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec83a867baa26076bbbfef/1626112936772/pixitowekalijesof.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60efd90c38a0fc3ca966f98f/1626331404282/fupusepe.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed90d5f9a98d6db3af4e74/1626181846074/information_technology_terminology.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_off0000c937.bin
ce021f9eb43db90beb6e1f8bd8e92527521bfe472fd0a8eed6b2d92817073d05
pdf-font-stream PDF embedded font (sfnt) at offset 0xC937 10840 bytes
font_01_sfnt_off0000e20e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE20E 16792 bytes
font_02_sfnt_off0000fa20.bin
a55461018e7cd95dccd4dfc3916cdb402407ab561776fb7c7ca238b3d9de556b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 15228 bytes