Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50290a076638510…

MALICIOUS

PDF

184.3 KB Created: 2015-08-08 10:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6) First seen: 2021-10-24
MD5: d1e8f1b42ac56525450328eadd50e433 SHA-1: 8b0f0001848abdeae3515e4630ffdc8639231915 SHA-256: e50290a076638510b6b5b752706d0c8274eaa1546b08666b33139e22114c1d94
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The embedded URL `http://botcraftman.ru/...` is the primary indicator of malicious intent, likely serving as a lure for phishing or malware downloads. No scripts were extracted, but the presence of a malicious link is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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=%D0%BD%D0%B0%D1%81%D1%82%D0%BE%D0%BB%D1%8C%D0%BD%D1%8B%D0%B9+%D1%82%D0%B5%D0%BD%D0%BD%D0%B8%D1%81+%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&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/6//4385/4385657_goluye_devushki_krupnuym_planom.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386022_adobe_pagemaker_70_rus_torrent.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386297_skachat_igru_cherepashki_nindzya_mutant_melee_cherez_torrent.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_off000241e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x241E7 3556 bytes
SHA-256: 880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281
font_01_sfnt_off00024f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F6A 14736 bytes
SHA-256: 8800698c5428bbde846e12eec9422720ccd26a391441ee0bb5ccf202da63357d
font_02_sfnt_off00027d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27D67 14468 bytes
SHA-256: dbc3da39f0035cfe760ab64a497eec5c4b1ebe4f79fbba732b355541a3d7ec37
font_03_sfnt_off0002a81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A81B 6560 bytes
SHA-256: aa487157f1d2102a73308fec736198090da6415df8432736a293cd61e55a884a
font_04_sfnt_off0002bab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAB4 6084 bytes
SHA-256: 819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3
font_05_sfnt_off0002ca49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA49 3752 bytes
SHA-256: 9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e

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