Malicious PDF — malware analysis report

Static analysis result for SHA-256 53304e46d0569e7f…

MALICIOUS

PDF

89.6 KB Created: 2021-07-14 00:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac1f620f705c964ce42ebc3988a8405a SHA-1: 9ad63f56a00768a5dd87726998ed75ee79abb17f SHA-256: 53304e46d0569e7f878b9e1ed268b4849ff9a94b9aae45c3d7d1a814ed30f601
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. It contains embedded URLs, one of which is associated with a phishing lure. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classification suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8615

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/~3/7R6buoffwiA/square?utm_term=haskell+compiler+online
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8d2b97282d6f469101bf/1626115371824/importance_of_comparative_education.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee01b5e55429721e24f60a/1626210741061/rheumatic_disorders_of_mitral_aortic_and_tricuspid_valves.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7773a00780223f09d34b5/1625782074316/why_should_we_hire_you_interview_answer.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed9a244325c5343bb967fd/1626184228905/phora_with_love_2_album_download_mp3.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edae275a30a704d0c18f83/1626189351740/11972586465.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7e8a59713006cbe0d1ec/1626111626804/does_extra_virgin_olive_oil_break_a_fast.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edffe8b0089c62dc41ffe3/1626210280666/resume_template_download.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_off0000f978.bin
f93aefd7c61390db8999124f9a6e8f95f59d70001e35b1db0d6aec1359eefb48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 10520 bytes
font_01_sfnt_off0001114e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1114E 16792 bytes
font_02_sfnt_off00012960.bin
e526848835257c2b77535442fe0fb836fd699ca756f681b566a94c1c6e577dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12960 18352 bytes

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