Malicious PDF — malware analysis report

Static analysis result for SHA-256 899e35ebd827abc4…

MALICIOUS

PDF

79.2 KB Created: 2021-07-14 00:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ffeb12d2df67279436055e2eb7bd29a SHA-1: 4a7bed08bb9a0f63fd04d076e6aaf6c967fde68f SHA-256: 899e35ebd827abc436670cfd54dbc91438baaab9755f6851c18b06d806019bb6
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to an external website, identified by ClamAV as malicious. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious link.

Machine Learning

  • Nyx PDF Classifier clean score 0.1551

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://inwebjor.ru/square?utm_term=another+word+for+choice+making
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9f07c81c37306b3159e5/1626119943803/advanced_scaffolding_voc_questions_and_answers.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_off0000d38c.bin
d55c1e6db3cc88cd2c257d98e4069b13ff25a8dd9d0ffe5f8204210e0ae2e4ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD38C 10868 bytes
font_01_sfnt_off0000ec5e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5E 16792 bytes
font_02_sfnt_off00010470.bin
c363bf10c85d4ba4146b0621c73f3292aa7cc5d0cef97da368e523adbe8339b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10470 17132 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.