Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e7bc82188b6eb1…

MALICIOUS

PDF

184.5 KB Created: 2015-07-24 04:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9bc1948dd3ec7f2949b84bf9be3b72d8 SHA-1: e9401cc664f99011b049054079e89818e6007ace SHA-256: 72e7bc82188b6eb18b5be4dbe702d2e8cce4c8177cf275c0630c4be6336698e7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of the malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 2

  • 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.
  • 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=Enterprise+1+coursebook+%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D1%8B+%D0%BE%D0%BD%D0%BB%D0%B0%D0%B9%D0%BD&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187147_skachat_root_prava_na_android_4_4_4.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185333_skachat_piksart_na_kompyuter.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185381_koduy_strok_buhgalterskogo_balansa_2015_dlya_maluyh_predpriyatiy.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_off0002a31d.bin
0b434c175d244a14bd6086d1d270af1ed7c12514220c803773e279bac03edd40		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A31D 7180 bytes
font_00_sfnt_off00023c15.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C15 3556 bytes
font_01_sfnt_off00024998.bin
efb816db5d53a35d69a788742e8d2ade6e3cb0621a819322c50c57ed29a56768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24998 14648 bytes
font_02_sfnt_off000277b1.bin
389e5d5c68072eaa24b6004565e411da60bac763a1cde0fbc14bcadc20b04ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x277B1 14712 bytes
font_04_sfnt_off0002b81b.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B81B 6084 bytes
font_05_sfnt_off0002c7b0.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7B0 3752 bytes

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