Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99b391eb2224e17…

MALICIOUS

PDF

83.8 KB Created: 2021-07-20 13:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e121b51c590cb9554dbabb413829a8a SHA-1: a2df25b420acd966a08128c69c3bc27a02b7255d SHA-256: e99b391eb2224e17465ed81e467395e3d0e1bd69683026e11612f02ebcaea623
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. An embedded URL was found within the document, which is a common technique for phishing attacks. While no scripts were directly extracted, the presence of an external URI and the phishing detection suggest the intent is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/~3/0YvHz_IItD0/square?utm_term=the+best+answer+of+tell+me+about+yourself
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f61b5eaaa839667713a1d9/1626741598219/pimep.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee41b9796bb0196c61fcb6/1626227129602/puwetesejusudesuvuvovix.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f2c1b236db646251998120/1626522035013/the_rise_of_the_ottoman_turks.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4c8279c7c9f0ea9ab37ed/1626654759912/rokigenasodaz.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f63a9a1f7e03497865a597/1626749594379/evs_worksheets_for_class_2_my_family.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edea6ce635d7166462db20/1626204780732/watch_your_actions.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7b8a40274373759595ec/1626110859057/susezezogasiziturotow.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f469909c7c9f0ea9a54ea2/1626630544260/84711845899.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7d2f857d2352c927c031d/1625805560732/text_connections_anchor_chart.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efd88f39c5d52effb4f4ce/1626331280025/43976725018.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f087047431cf2d46dfd7bf/1626375940766/crowd_opposite_word_in_english.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f5a173eceeb50d65b3bb77/1626710387763/easter_picture_quiz_with_answers.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f18172347a2e2c840362c9/1626440051073/31364891937.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_off0000e3b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B0 16792 bytes
font_01_sfnt_off0000fbc7.bin
5898426b5f9b4ae770446ac2304ccaa9a3490b3624723229ca081c6c35ca421d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC7 10792 bytes
font_02_sfnt_off00011492.bin
29825cd52df53edc2c107b6d2eb37c6ecdab17c2ce3551ce1048fb9cea90daab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11492 17084 bytes

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