Malicious PDF — malware analysis report

Static analysis result for SHA-256 92bbef90e37bd660…

MALICIOUS

PDF

71.2 KB Created: 2021-07-20 12:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 351d300b45a5b4cddc9c00d84be8ee51 SHA-1: 6674feef9c5a53348d68bca78507f7f057cc6b67 SHA-256: 92bbef90e37bd660267df79cb732e2358a894718b861f57ec5b8c7d895a08be0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'inwebjor.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious external resource, characteristic of phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8363

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://inwebjor.ru/square?utm_term=bill+nye+do+it+yourself+science+worksheet+answer+key
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f120f59b6f236119568364/1626415349781/once_upon_a_time_in_hollywood_streaming_full_movie.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee16f74d490f67274f0bee/1626216183174/economic_and_financial_analysis_of_projects.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e85283e98ab22bd7d49ab5/1625838211612/the_meaning_of_immoral.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f4aeb3d68f32259068edb3/1626648243809/59068176784.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f38c346167905317dd9538/1626573876780/lerubufelakip.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f5005b668793736d456e34/1626669147985/meaning_of_vickey.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_off0000b412.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB412 16792 bytes
font_01_sfnt_off0000cc29.bin
1b8d6e508fa54308e0096ab8d7e6997b496f13953e4941ed43cad8202dcfb875		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC29 11020 bytes
font_02_sfnt_off0000e5d6.bin
95fb69ec035c17b5f1396206c5fa2061a70ad5997bdde2b80e5843c3342cb3b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 16392 bytes

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