Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25af32272dfed38…

MALICIOUS

PDF

88.7 KB Created: 2021-07-13 18:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 412728d21580cd9771b6d5f59d46a6f7 SHA-1: 915f832940225fed2cc468d2b05db467f6edfabd SHA-256: f25af32272dfed38c895e0a9c7a8f0b9bd61838ad90ea6e7894ca37038af379f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://drafthe.ru/square?utm_term=matrix+problems+and+solutions', which is likely a phishing or malicious landing page. The document body is heavily obfuscated, suggesting an attempt to hide its true purpose, but the presence of the external URI is a strong indicator of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://drafthe.ru/square?utm_term=matrix+problems+and+solutions
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7e458300fd66e195c11b/1626111557949/introduction_to_sport_law_with_case_studies_in_sport_law_2nd_edition.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9297e4ca3800a118e8dd/1626116759916/zovokerugedapusidaj.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edb7969117a44628c31eb7/1626191766885/conver_word_document_to.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec83bfe94d7a30e055441f/1626112960136/resource_based_theory_of_strategic_management.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca8bd83836e7a7d644a25/1626122430153/annexure_for_form_6.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8fde73f195e1e4034e2b3/1625882087357/ragetojidemofomaroxopere.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9c6f69d4b63361493c0d/1626119280034/zopiclone_and_zolpidem.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed98dbc8cbd011b90b7d61/1626183899194/75748073015.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed7721c1f2f61945a4154f/1626175265546/40586693789.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9332219a9f87deb736eb8/1625895714378/velugemorijisezenadebut.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e922a9854c1d3b34870434/1625891497866/21560290267.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_off0000f9fb.bin
5c4fc0ec8cca1039c0e1d6b98a7302ef625ffafb3441275dfa356c7b0cfc2ebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 16976 bytes
font_01_sfnt_off0001261d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1261D 16792 bytes
font_02_sfnt_off00013e34.bin
4d2a5cbb232b963407c356156f3e8f5d0e7fb307eed9fd1ba3720bdaf62b6724		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E34 10888 bytes

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