Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c396935c4556ba…

MALICIOUS

PDF

184.5 KB Created: 2015-07-24 11:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: ccb8ac53cf3316cd144b2fcdc044d18c SHA-1: eee99815cd414fd119d460790f0b21c13479ff80 SHA-256: 84c396935c4556ba5155887842a37adde959900e185e46e41e0d0d01bfa67bb0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded URL `http://botcraftman.ru/?lip&keyword=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+skins+for+minecraft+pe&charset=utf-8` is the primary indicator of this malicious activity. The ML classifier also provided a high confidence score for maliciousness.

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-7494318-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7494318-0
  • 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+skins+for+minecraft+pe&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188459_saundtreki_iz_filma_forsazh_1.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184715_primeruy_nachisleniya_otpusknuyh_v_2015_godu.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190010_dennis_vuli_otkruyt_schaste_skachat_knigu_besplatno.pdf
    • http://www.microsoft.com/typography/fonts/You
    • http://www.microsoft.com/typography/fonts/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a415.bin
064f5782493fd67feb96368cd76537a06ba135a430c067f56a63505b0295d068		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A415 6960 bytes
font_00_sfnt_off00023d2d.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23D2D 3556 bytes
font_01_sfnt_off00024ab0.bin
d1dde2362ef925e1f16403db090c01490ac6bf1e158322fe2bbf56eaccd7d7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24AB0 14684 bytes
font_02_sfnt_off0002783d.bin
5c213e163289916afad80bbba03618076c682277abdcb5749cef716a5b3e2e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2783D 14840 bytes
font_04_sfnt_off0002b834.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B834 6084 bytes
font_05_sfnt_off0002c7c9.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7C9 3752 bytes

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