Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95def7cec691118…

MALICIOUS

PDF

185.3 KB Created: 2015-07-24 00:36:56 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e0db11c6e2e0543ec1c393b837280763 SHA-1: 7d596028275f94640e11422fe8258232d1b78493 SHA-256: f95def7cec691118404ca59b9b6c10a770f643d034f4363910cd0359277c721c
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL `http://botcraftman.ru/?lip&keyword=Imediashare+%D0%B4%D0%BB%D1%8F+windows+7+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8` is the primary indicator of compromise, likely serving as a lure to download further malicious content.

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-8790612-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8790612-0
  • 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=Imediashare+%D0%B4%D0%BB%D1%8F+windows+7+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184457_spravka_o_srednem_zarabotke_dlya_centra_zanyatosti_blank_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185298_skachat_albom_grigoriy_leps_gangster_1_2014_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186184_kontrolnaya_rabota_po_literature_9_klass_literatura_20_veka.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a667.bin
cc36f1fe102a4340423cea3deb7322f38758d26620be85b8e308150a435c727d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A667 7172 bytes
font_00_sfnt_off00023f26.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F26 3556 bytes
font_01_sfnt_off00024ca9.bin
a3ab682f2ca73009197e8960e457f31e0b56c62d4aa554ba9ebb09a78fdadb71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24CA9 14888 bytes
font_02_sfnt_off00027ab2.bin
ca38be49ae9a27c206b6596e189f3ef1cd598f885a551e59857a20dcfeaf89fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27AB2 14852 bytes
font_04_sfnt_off0002bb4d.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB4D 6084 bytes
font_05_sfnt_off0002cae2.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CAE2 3752 bytes

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