Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc8421cae975d0d…

MALICIOUS

PDF

365.2 KB Created: 2015-09-27 18:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 2f969504c7d6f008c5129d3ed88b1a93 SHA-1: d03cc9437008665c767ba3956aef50bb246740a5 SHA-256: 6cc8421cae975d0d3ba580a9399948e73f4583224242f839707b3e75aa028889
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an external URI and a redirector link pointing to 'tiogalo.ru', which is flagged as a lure for free downloads or phishing. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect the user to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tiogalo.ru/?sou&keyword=%D0%A1%D1%86%D0%B5%D0%BD%D0%B0%D1%80%D0%B8%D0%B9+%D0%9A%D0%BE%D0%BD%D1%86%D0%B5%D1%80%D1%82%D0%B0+%D0%9F%D0%BE%D0%B4%D0%B2%D0%BE%D0%B4%D0%BA%D0%B8+%D0%9A+%D0%9D%D0%BE%D0%BC%D0%B5%D1%80%D0%B0%D0%BC&charset=utf-8 PDF link annotation
    • https://bontponrater1989.files.wordpress.com/2015/09/kak_uznat_rezultaty_ege_2015_po_geografii.pdfIn PDF document text
    • https://nistdeatibooks1979.files.wordpress.com/2015/09/bonus_kody_dlia_wot_na_iiun_2015.pdfIn PDF document text
    • https://flabunmanbe1986.files.wordpress.com/2015/09/zaiavlenie_na_otpusk_v_schet_budushchego_otpuska_obrazets.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E74 9544 bytes
SHA-256: 759b71a2b473cac596b471b288e56dcb64e6478cc272bff7936800ff105bef48
font_01_sfnt_off00058a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58A02 13740 bytes
SHA-256: b3266ff2ca325dcc5a4677f64516034467aade2a23f05dd23f044c96af157ac1

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