Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9053e1cb9a2555…

MALICIOUS

PDF

79.1 KB Created: 2021-07-19 00:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be3711e238099123cf48bc6890492d38 SHA-1: e4258e74692f9282ebe85c744439a1e6308f6b48 SHA-256: 6c9053e1cb9a2555c7bd265d706ca73f45b5f38559d0837e7dcfeac5a786ad62
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ClamAV and an ML classifier, suggesting it is part of a phishing campaign. The embedded URL, although marked as benign, points to content related to saving edited PDFs, a common lure for phishing. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/sq/ugae/~3/-MXWpcYQ7kA/square?utm_term=how+to+save+edited+pdf+on+mac
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee3a425f7927514e3cfe9e/1626225218337/95374284371.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed9a74f53e3457ef8694a3/1626184308979/99579935607.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e83f64f0b0395a876f0495/1625833316230/lefinagatobusuviluvi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f49c20730b252c88239b99/1626643489099/mazesejagipabodinij.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e94f17e6a58043b6930493/1625902871365/editables_from_indesign.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f07754e9e0d35c3b8f0517/1626371924172/come_down_bengali_meaning.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f95f320dbd0de27f92bf/1625880927840/roxikifom.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f49c7629712869f07588a1/1626643574945/76195965306.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f32e161ad9bf1c32b27062/1626549782748/plural_of_louse.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee6e57df274736e0ae959b/1626238551153/10_1_areas_of_parallelograms_and_triangles_answers.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f499a45f13a15bd82d24c5/1626642852542/how_to_search_in_iphone.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed8ec00318596fdcc528aa/1626181313113/mission_bay_shuttle.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_off0000d4a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A0 16792 bytes
font_01_sfnt_off0000ecb2.bin
b0d8011290f80b38eb455cd42c2546c21c4b3e20a01f7af481716d2c5dd348ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 16408 bytes
font_02_sfnt_off00011773.bin
7b7193fcdaf4dde3840ef330a6ef00af7572da442e6b76dd26c53a3441039593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11773 10776 bytes

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