Malicious PDF — malware analysis report

Static analysis result for SHA-256 f848072765366c80…

MALICIOUS

PDF

84.8 KB Created: 2021-07-21 15:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c63e7ade004427ea9e3d37df273d0166 SHA-1: 60c1e4bf346eb2694d0950e3d748c8535edd7e1f SHA-256: f848072765366c805e408bc7dfc8a51c349810759715333b2921d470c34372b3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains obfuscated content and references external URLs, suggesting it's designed to deceive the user, likely for phishing or to download further malicious content. No scripts were extracted, but the presence of embedded URLs and the overall detection profile points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://feedproxy.google.com/~r/sq/ugae/~3/aauXj3bnHUA/square?utm_term=solutions+manuals+online
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ede426ea8d40126a1c9df0/1626203174907/bevumifisirox.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f223a527519501fc058022/1626481573185/paper_bag_manufacturing_project_report.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e769786f26a74a07f859e3/1625778553100/oxygen_concentrator_machine_on_rent.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9b93704a383bbedb9f86/1626119059771/unmount_nfs_share_in_linux.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f7a5de738e220870a72bac/1626842590982/new_tom_and_jerry_cartoon.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7da5c48fdc2594040bf4e/1625807452348/billy_campbell_diana.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecac22478ebe26bfc9442f/1626123299084/the_meaning_of_cooperation.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1657444f13e0787b52610/1626432885079/57162691126.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f28d532be78d52659304f3/1626508627328/operating_system_concepts_with_java_avi_silberschatz.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f05b40b514222d3a53226f/1626364736815/xopafiluregetivuperuk.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1099bf32be22f007576e9/1626409371219/pick_me_up_competition_answers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee5e368e3fff2bd3c2aed7/1626234422587/my_own_boswell.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1b645ae23972da1db736a/1626453573791/furetufepuduzuvulule.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f4983d668793736d3f566c/1626642493319/captive_in_the_dark_free_read_online.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7d355dbc52028c83f311b/1625805653667/fizuzazozilerikago.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e77a4ac9fd751cf92b10f4/1625782858433/81024083228.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca7561951226b8b8e6f7d/1626122070888/jopojibun.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f15e96e7c78223958ae5e7/1626431126918/85856083087.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f109f8347a2e2c84fe4ae4/1626409464918/wewagedumijapexobari.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e894cfa939df2b14d90ff0/1625855183726/xapadenemetadiloxij.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3aa4c9c57c249393f895e/1626581580630/apache_tomcat_interview_questions.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f543e829712869f07e4101/1626686440900/linux_png_to.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_off0000ece6.bin
809ee48e9af3428ed08c1d670ca9ae4c02803f2a8c7598b631c0f8c67838b81d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 10344 bytes
font_01_sfnt_off00010439.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 16792 bytes
font_02_sfnt_off00011c4b.bin
3d0ceb6e25f464aaa7ca29227391e5d6b42305cb02b9bd9965211010b79540b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4B 15856 bytes

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