Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 b5c37a6eb0758218…

MALICIOUS

PDF / .VIR

220.1 KB Created: 2023-03-08 09:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 5.15.4) First seen: 2024-04-16
MD5: ed52ba78df8fc29ff7d045ee70d22abc SHA-1: 65e4da95237b61725a25095967d19d4905125db8 SHA-256: b5c37a6eb0758218ac8843b78750579c12c8e66e608e0e33317cd8c78d6934fd
106 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0141

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gluvoob.com/123n?utm_term=behavior+modification+miltenberger+p PDF link annotation
    • http://www.bitstream.comIn extracted file (font_00_sfnt_off00030900.bin)
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0003509c.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0003509c.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00030900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30900 17292 bytes
SHA-256: e4450772c247fdeec77f3c67ded87cf3c0f4adc3069d513548796348ea7265d5
font_01_sfnt_off00033825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33825 10244 bytes
SHA-256: 37fc3a59e41adde2dc3b40641f5e0181e1606ed91e926a31a73f56c8ab361d68
font_02_sfnt_off0003509c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3509C 8940 bytes
SHA-256: 897a1d9f6f4b474150d2504b8fa79d1507a5ac285a7fb2bf61803f06dc51c46c

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