Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d5fcdaf7011646…

MALICIOUS

PDF

357.8 KB Created: 2015-12-02 19:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 9f6f64b82aa5b0bdaad20842a11b7716 SHA-1: 546ad52f1738e893b5631e81ab00faff98a957fe SHA-256: 88d5fcdaf70116469223c1b0169aecf9fc5d958084fa56f06207c60055623d7f
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is a lure for free downloads, redirecting users to a suspicious URL. The ML classifier also flagged it as malicious. While no scripts were extracted, the presence of an external URI and a redirector link strongly suggests a phishing or scam attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 3

  • 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
  • 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=Ls+young+models+torrent&charset=utf-8 PDF link annotation
    • http://media.nn.ru/data/ufiles/2015-12/5d/26/60/565f1877e1b28_khlebopechkatarringtonhousebm2700instruktsiiaskachatbesplatno.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/a1/1b/28/5659292de9346_skachat7daystodiechereztorrent.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-12/db/7e/fd/565e71914a6d1_kliuchdliaanno1404venice.pdfIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000552d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x552D6 6208 bytes
SHA-256: 4675e5193f00ced38aaaca9a6c231bb8a836fa18baad944e95534aa304ae1d4e
font_01_sfnt_off0005653e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5653E 16612 bytes
SHA-256: 68d00428506128a922d4053c4c4f1c4756292a14409c9f6e86df4e8c76d94655

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