Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bca342c26af3ea6…

MALICIOUS

PDF

185.1 KB Created: 2015-07-26 05:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6) First seen: 2021-10-27
MD5: 8294b1cf260eec8143e5bae99e632bcc SHA-1: 1aa592f94d740a209fa8c0c9f4ccf078da076344 SHA-256: 8bca342c26af3ea6c7598a485681aede99ff831f1bf4176727f06a33de81781d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to malicious infrastructure, specifically advertising cracked software. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL, which is likely used to host or deliver a secondary payload or phish for user credentials.

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.
  • PDF link farm advertises cracked/pirated software medium PDF_CRACKED_SOFTWARE_LURE
    PDF contains many clickable links whose targets use cracked-software, keygen, serial-key, or warez vocabulary. These are SEO-spam lure documents that rank for software-piracy searches and route users to fake 'crack' download pages distributing potentially-unwanted programs, adware, or droppers. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+block+city+wars+%D0%BD%D0%B0+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4&charset=utf-8 In PDF document text
    • http://fastpic.ru/In PDF document text
    • http://www.liveinternet.ru/clickIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/5//4193/4193352_budilnik_na_kompyuter_skachat_torrent.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184359_batman_arkham_city_rusifikator_zvuka_skachat_torrent.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4208/4208368_3d_roliki_dlya_televizora_lg_skachat_besplatno_torrent.pdfIn PDF document text
    • http://www.microsoft.com/typography/fonts/YouIn PDF document text
    • http://www.microsoft.com/typography/fonts/In PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a59d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A59D 7128 bytes
SHA-256: f8297284d512cb9d5d0dc230b851f9859b6d4736ac653c89262fab24d437d43a
font_00_sfnt_off00023e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E9F 3556 bytes
SHA-256: 880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281
font_01_sfnt_off00024c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24C22 15052 bytes
SHA-256: a737726d3e725117273b37139c7aec384c39c7de2bc2413a3ba526cd2f3dbdce
font_02_sfnt_off000279f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x279F0 14780 bytes
SHA-256: 9ef9798eb14e99e671a513ad5e569745056c3099449caba0de13db0668b55e40
font_04_sfnt_off0002ba7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA7B 6084 bytes
SHA-256: 819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3
font_05_sfnt_off0002ca10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA10 3752 bytes
SHA-256: 9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e

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