Malicious PDF — malware analysis report

Static analysis result for SHA-256 85fabd0bb96abade…

MALICIOUS

PDF

75.6 KB Created: 2021-07-18 00:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e395b6c984247939231a079696b3384e SHA-1: a0d53e86916b8d213919c94d1f622f9802e8e73c SHA-256: 85fabd0bb96abadef007acf6e4bcabd3ab9d07b85ea82158f236169fdc75f22d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. The presence of embedded URLs, despite some being marked as benign, indicates an attempt to redirect the user to external resources. The PDF_URI heuristic specifically points to a URL that could be used for malicious redirection. While no scripts were explicitly extracted, the nature of PDF malware often involves JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/~3/4Ji06Fp1PxY/square?utm_term=mp3+and+mp4+music+download
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec93f451a87c5d75ad4880/1626117108832/avatar_airbender_fanfiction.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edd42de635d7166460a83e/1626199085395/vizewinefezile.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_off0000c69d.bin
5de5d6fd592f683e26bdf155c52c3f931b471ddc0b0cbc7098fd3c6235eb9392		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC69D 10772 bytes
font_01_sfnt_off0000df78.bin
823cdcf9fe1c52eaabc9ee55c3c0050343859194a7a053d563d552b95cc88960		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF78 16744 bytes
font_02_sfnt_off00010af1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 16792 bytes

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