Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23ecd36b812df37…

MALICIOUS

PDF

186.3 KB Created: 2015-07-24 11:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 00a1c273abf638ffdaaefe5b88034624 SHA-1: 0b634cf4a7905afd1d77a6756bc96d43709fb169 SHA-256: a23ecd36b812df37d6c785922b4d4b7e3804d35da42516e67daa2d23e09df6a2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to botcraftman.ru. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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.
  • ClamAV: Pdf.Dropper.Agent-9307536-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9307536-0
  • 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%BA%D0%BE%D0%B4+%D0%BF%D1%80%D0%BE%D0%B4%D1%83%D0%BA%D1%82%D0%B0+%D0%B4%D0%BB%D1%8F+microsoft+flight+simulator+x&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188772_skachat_real_racing_3_na_kompyuter.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187801_ramki_dlya_blagodarnostey_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191625_skachat_maynkraft_125_s_100_modami_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a92a.bin
42e82bfcf294dd0d7f4e2b519ec9e316aae4858158c15909c9b234513fa45143		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A92A 7588 bytes
font_00_sfnt_off000240d5.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x240D5 3556 bytes
font_01_sfnt_off00024e58.bin
7fbcf29ab48626f43462d23fe6f2a8f59fed8803d505e0f207aa59b43bbb7f4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E58 15144 bytes
font_02_sfnt_off00027cf6.bin
bf26e67ad6148c9dd9a090f199a4a5adc47a165563d65a30f3f02a05e91a2ee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27CF6 15008 bytes
font_04_sfnt_off0002bf81.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF81 6084 bytes
font_05_sfnt_off0002cf16.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF16 3752 bytes

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