Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7413dc237f0a34d…

MALICIOUS

PDF

78.1 KB Created: 2021-07-14 07:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9fc2aa800e3118f4979e2f5f52b5f7a5 SHA-1: 7ca33bbf1dc0c53634e56daa14fb345b5543cc1b SHA-256: e7413dc237f0a34d83f8073e10e2beae07ac1c2e1bcc1fca30ab5e2d7a62a5cc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. It contains an embedded URI that points to a suspicious URL, likely intended to redirect the user to a malicious site. The ML classifier also indicated a high probability of maliciousness. No scripts were extracted, but the presence of external URIs suggests an attempt to download or redirect to a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8621

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/razvivatel/yapz/~3/kVSxLQpkboc/square?utm_term=bile+leak+after+cholecystectomy+icd+10 PDF link annotation
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e94866c0906550d90c75a7/1625901158132/kobolerupuru.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee1c409b1e4d6a360aa345/1626217536139/kelavosenopisagi.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee5f561cf0e6777f30b5b4/1626234710895/words_their_way_spelling_inventory_student_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee28323753dc428c86c81c/1626220595034/ihome_instructions_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e944c9fc46b150582920a4/1625900234028/tagokip.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 11072 bytes
SHA-256: e6c4daf8d82ce2dd7d6d826f0d61b921b47b3a81233345ee1ae6f5905d96dd7d
font_02_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 17680 bytes
SHA-256: 9d0ee6dbe0712ef2ff8306d4c3259718b1fa28f951c0613015cf9d1f4f02898d

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