Malicious PDF — malware analysis report

Static analysis result for SHA-256 500f3f1468d77183…

MALICIOUS

PDF

75.9 KB Created: 2021-07-15 16:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be13f01511ede01d55c33d8c230bacf3 SHA-1: 80ca2f124bdad84fbeb97bcb7c7037acaf88eb3f SHA-256: 500f3f1468d77183b46b51e2ebb1292e271907ae7985c14c5054178ff4bf0cdd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are confirmed benign, suggests an attempt to direct users to external resources. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristics point towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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/v-xubMviL4Y/square?utm_term=itextsharp+html+to+pdf+with+css
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edd756f6d8087912bdaf3e/1626199894932/final_fantasy_15_multiplayer.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f02f6624fa75375d8753aa/1626353510917/functional_calculus_of_variations.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edc3fe930ff80baa0942a0/1626194942741/foluvorejeda.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7a1bfefb14d11220df793/1625792959795/binorufewu.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_off0000c9fd.bin
90146e9764fa596de3df3e07e4e290693b60fed62882eb7b4051c157f7e033f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FD 10920 bytes
font_01_sfnt_off0000e35d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE35D 16792 bytes
font_02_sfnt_off0000fb6f.bin
33107b7f4ade3c978a887504b566c8df7210b0ff3e6a1f85df2e66a0a3f52956		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6F 15944 bytes

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