Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd2310995c13ced…

MALICIOUS

PDF

90.3 KB Created: 2021-07-13 00:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d597db886ec49852b8c134cc5268565 SHA-1: 84b107988cfff4ac6f57195e1372808513514abe SHA-256: 7fd2310995c13ced0020f66bb03d2221dc963e257603974fa1313399cd61ee80
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains embedded URLs, suggesting a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9451

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/razvivatel/yapz/~3/um1bUVUAM38/square?utm_term=simple+biology+questions+and+answers
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e912fbe6a58043b69101cd/1625887483655/29538604198.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecb32dea6ac6690684f00a/1626125101699/oxford_business_dictionary_free_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca1d7bcf8be39b5081ca7/1626120663462/wordsearch_print_off_sheets.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7b28c8b0d544b6d6c63d/1626110760708/best_picture_2013.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9738b3b63f0898f3b414/1626117944918/computer_science_book_for_class_12.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eca52c1d0b393375543563/1626121516696/type_of_cartilage.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecb34024a9242ea9f16f0b/1626125120289/insect_and_wind_pollinated_flowers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e87e71cbc8736ed7b2902c/1625849457471/class_11_physics_chapter_4_notes_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe5.bin
2dc1215d642388616529112ff26608835917a02c68ff78c7a57f320c1a24c4dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 17956 bytes
font_01_sfnt_off00012af1.bin
ab2b56393a74bbb1f2e708dc8cff6fdfeec5032acd599d15351759347d65b5fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF1 11396 bytes
font_02_sfnt_off0001451b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1451B 16792 bytes