Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e48523a9008417…

MALICIOUS

PDF

85.6 KB Created: 2021-07-12 20:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4d399ca9952cc741859ecbd73501856 SHA-1: a2d2c49d0f1a8dfb2e10dbc21fa35610fb196748 SHA-256: d6e48523a90084178c73a07bc1cc48e4deb1d3f5b1b1020d6d9d2a8ee68b02d2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a malicious website. No scripts were extracted, but the PDF structure itself facilitated the inclusion of the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://nomylo.ru/square?utm_term=rob+from+antm
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e90b413b7e7c63344f55bb/1625885505274/44587321999.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8d14fc81c3e1fd729e33f/1625870671108/periodic_table_with_properties.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8f1bcc14ff043cd5aa52e/1625878972215/73882371603.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ee6c309bd63f3d83b392/1625878124361/veviboridutorunaripi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78b7c217102653d50b21/1626110135559/96140396385.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e82cb546a8e17713e8004f/1625828534097/80973630137.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9525927127e6804174c30/1625903706103/convey_my_wishes_to.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7a4712c1416d2f19d4a8/1626110535156/moral_but_illegal.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e908dfb9b95949b65da314/1625884896090/69366844552.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7920947cc46ca1277ced/1626110240762/all_i_want_for_christmas_is_you_vance.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e856f5c7527c785cd38efe/1625839349455/collagen_structure_and_function.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7f5f3a853d606aec0260/1626111839820/tamil_song_new_song_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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07f.bin
84b3643dd4295e227909d6d41782e125aae0973f0a61dfb98bc2ab0a83dbc899		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE07F 10120 bytes
font_01_sfnt_off0000f715.bin
1cde6b4209c4fb7468ef4b229210b046e434a59fe67585498ce0d7b3cef13bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 17664 bytes
font_02_sfnt_off000124a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124A2 16792 bytes
font_03_sfnt_off00013caf.bin
914809193ce2cf582c6fca3a5551e44983bf6b44162c4a16bb62aa68b877d797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAF 2792 bytes

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