Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5c1e969bf668fc…

MALICIOUS

PDF

186.2 KB Created: 2015-07-23 20:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6) First seen: 2021-08-25
MD5: c41a095178820f014d1a473322c41a60 SHA-1: 0b312eb23f0d5114e1a79b855c0b9bc66b924241 SHA-256: ba5c1e969bf668fcbc273c9e708d7cb143a79b480a0045e9cb9924a927ca2d48
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector. This indicates an attempt to lure the user to a malicious site, likely for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://botcraftman.ru/?lip&keyword=%D1%81%D0%B8%D0%BC%D1%81+2+%D0%BF%D0%B8%D1%82%D0%BE%D0%BC%D1%86%D1%8B+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8 In PDF document text
    • http://fastpic.ru/In PDF document text
    • http://www.liveinternet.ru/clickIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184295_skachat_mp_flooder.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184281_skachat_prilozhenie_sberbank_onlayn_na_kompyuter.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184311_skachat_bot_dlya_seosprint_2015.pdfIn PDF document text
    • http://www.microsoft.com/typography/fonts/In PDF document text
    • http://www.microsoft.com/typography/fonts/YouIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000244c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244C7 3556 bytes
SHA-256: 880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281
font_01_sfnt_off0002524a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2524A 15036 bytes
SHA-256: f73cfa7158895ef38747d421b3ff48f7b69eaba50a27f008712bf726ab3c9a6a
font_02_sfnt_off00028182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28182 14468 bytes
SHA-256: a8c28ff59a65b28ee09e50dd1c7720660447add6a998d01502f877442c6e77ea
font_03_sfnt_off0002ac34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC34 6600 bytes
SHA-256: 246bbd8405e06f03cafa94f8166da79768d30783aefe12257d3d7ea28d7baabe
font_04_sfnt_off0002bf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF10 6084 bytes
SHA-256: 819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3
font_05_sfnt_off0002cea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEA5 3752 bytes
SHA-256: 9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e

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