Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49faaa467a5edd2…

MALICIOUS

PDF

77.9 KB Created: 2021-07-14 06:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c2c5caf42e27b23592a12d4ed9b3a62 SHA-1: df92f2997f31c9c3b46ac0d40e582749c2afa886 SHA-256: b49faaa467a5edd2d5d410e431d6d13cedbcca08291816131f3b775fd6f11885
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to potentially harmful content. The PDF structure itself contains duplicate objects, which can sometimes be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/kVSxLQpkboc/square?utm_term=how+to+screen+record+on+iphone+xs+max
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7c5de86d8930991a53de1/1625802206666/about_to_take_place_crossword_clue.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e834c3687a3d659a4fd1b6/1625830596014/black_over_bleached_hair.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c9f3e1e3555a32468f1f/1625868787082/side_bangs_for_round_face.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_off0000ce35.bin
b97ca290fa58ddd5d53962eab2e4b18d0a4a1ddd7ab2c6fcc50d7a0f4e53359a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE35 17072 bytes
font_01_sfnt_off0000fab8.bin
a809df1e48b2d9444cd134fcba88ce1c91ed87772f8dfe2d2fed770792fd4da2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 10912 bytes
font_02_sfnt_off000113d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113D8 16792 bytes

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