Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05fe9a6525a82b0…

MALICIOUS

PDF

81.6 KB Created: 2021-07-14 02:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82dee23b8d6f9437896284c00083cfa2 SHA-1: 3479be037075ab478644fc4c4eaaf97def786b0e SHA-256: c05fe9a6525a82b03a8ceb6365ceca22a2a72444e00c9e8a5f60284037da3a71
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, suggesting it may be used in phishing attacks or to redirect users to malicious sites. No scripts were extracted, but the presence of obfuscated content and external links points towards a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8440

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/S-4CHg4Qmwo/square?utm_term=feral+druid+leveling+guide+wotlk
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee07fb2485902f3e6ef227/1626212347416/class_7th_computer_chapter_1_question_answer.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e79c0e4b964f05b8448685/1625791502599/fusemukobidavugaj.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee15f88685745b7d11d51a/1626215929011/xarivugodebapajewadupozof.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e923cf5fa2eb14b90bd126/1625891791609/moxiwaxu.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90f1e83ae0c490238525b/1625886494792/jexojad.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee04411f6a95122873f3fe/1626211393849/creating_a_java_file.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_off0000dd60.bin
6f6a36d11f33ad752449ae3e82c05066aa3304dbe2bebb8f3f984e86808eef02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD60 17212 bytes
font_01_sfnt_off00010a5c.bin
353bd0375f98e4851b200700eb51263e7e9906ec60720981d736ad36638410af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5C 10576 bytes
font_02_sfnt_off00012267.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12267 16792 bytes

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