Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f67ade0410f6ffe…

MALICIOUS

PDF

88.9 KB Created: 2021-07-22 00:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 709516f23497e8b301a763bbc0189411 SHA-1: 5a8fd94edfce8ab22fe65106844b4034a956f6bd SHA-256: 1f67ade0410f6ffeeb6d4336d5a9607841aef9c159ca1800c26afe521c3128ec
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://philabc.ru/square?utm_term=about+all+the+bright+places', which is likely intended to redirect the user to a phishing site. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://philabc.ru/square?utm_term=about+all+the+bright+places
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91977c91b61347ea3643e/1625889143751/jetom.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f5432edeec5816204631eb/1626686254972/death_on_the_nile_book_free_download.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0435b54c38e1eb64b0045/1626358620007/vajeboweg.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f4b3efac778402357ad82a/1626649583399/95915713450.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1d22c7c0af117ba03f741/1626460716523/51954357010.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f305af2e59700d3e5a1205/1626539439306/xijenedefotuvi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e908a28ce0e10532d1d1dd/1625884834113/the_notes_to_financial_statements.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f78b34738e220870a5d9fa/1626835764443/masked_forces_unblocked_games.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec83d43f7a034ccb7aa407/1626112981074/61954376922.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edb360262c1d401136c72c/1626190688723/convert_square_feet_to_meters_squared_calculator.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e932c3cc7c0864592772a2/1625895619210/the_fixer_read_online.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5a77108ca9154dbc99637/1626711922028/social_and_emotional_development_in_middle_childhood.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f05644473e18288dc6b8a7/1626363460835/the_absurd_existentialism.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e78cc9872c4c6263c01a1b/1625787593607/39795155646.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e78b5a4aaab0286a860e30/1625787226799/38843768893.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f499a45f13a15bd82d24c5/1626642852542/how_to_search_in_iphone.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_off0000f78a.bin
d4dfc5e027669be4009e02714b9a4f572dfada9656e534cfa6a8e63cb35e7177		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 10768 bytes
font_01_sfnt_off00011047.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11047 16792 bytes
font_02_sfnt_off00012859.bin
9ca848c1cbc3515e06cda899bb573d9df21550d246c152326264650f7461fc97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12859 17252 bytes

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