Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f999b4f627bac6b…

MALICIOUS

PDF

279.3 KB Created: 2015-12-06 12:25:23 +04:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: c5eb9f1a42bd58d281eb37fb95443db3 SHA-1: 8dba393c559f9a46f295b04b35d058b037056199 SHA-256: 5f999b4f627bac6b2914067eefebd322c3e067b3355bd678aeb8ae52ae1a2ecf
64 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0592

Heuristics 4

  • 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.
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://taurus-tg.ru/?nnr&keyword=%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0+%D0%BF%D1%80%D0%BE%D0%B2%D0%B5%D1%80%D0%BA%D0%B8+%D0%B7%D0%BD%D0%B0%D0%BD%D0%B8%D0%B9+%D1%8D%D0%BA%D0%B7%D0%B0%D0%BC%D0%B5%D0%BD+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+158+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8 PDF link annotation
    • http://taurus-tg.ru/?nnr&keyword=%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0+%D0%BF%D1%80%D0%BE%D0%B2%D0%B5%D1%80%D0%BA%D0%B8+%D0%B7%D0%BD%D0%B0%D0%BD%D0%B8%D0%B9+%D1%8D%D0%BA%D0%B7%D0%B0%D0%BC%D0%B5%D0%BD+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+158+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8CPDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_000_off0000022e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x22E 4194304 bytes
SHA-256: 1567ee61a742d887573a0956bbd70dcaf935dea9684d78861c53d6fc09d52fa5
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: NOP sled
font_00_sfnt_off00040ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40EC2 17812 bytes
SHA-256: 56c0ddd9a3bcf00e3b5e7072e89716a4e3de0ea37a14f8d6e7ce3c6288fb03e9
font_01_sfnt_off00043d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43D61 12200 bytes
SHA-256: 3b07558d428a10f864eb45455a893be638ca965a821f6e6301aecda8376869c3

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