Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed1a68f94fe5c23…

MALICIOUS

PDF

185.1 KB Created: 2015-07-23 21:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: a3132710cb7685ed9dc015f52a97a60b SHA-1: 21b0db5c7f3f55193d5490e0bebf868055f25de0 SHA-256: 5ed1a68f94fe5c23d7058ed13a802577ff077526975b146d33c5bedc9e8b70dc
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware download site.

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=%D0%9A%D0%B0%D0%BA+%D1%83%D0%B7%D0%BD%D0%B0%D1%82%D1%8C+%D0%B0%D0%BD%D0%BE%D0%BD%D0%B8%D0%BC%D0%B0+%D0%B2+ask+fm+ZIP&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184822_kod_aktivacii_dlya_kaspersky_internet_security_2015_na_365_dney.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184681_avid_media_composer_uroki_na_russkom.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184440_kod_aktivacii_dlya_kaspersky_internet_security_2015_na_90_dney.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_off0002a642.bin
0854988864af4ce25a18dbd69a183778a95e3dfd2066ba11d81da84e1416ce5f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A642 7036 bytes
font_00_sfnt_off00023ed8.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23ED8 3556 bytes
font_01_sfnt_off00024c5b.bin
bc5e7f0697368766057222de8e2e652ea138929d8103f28af2fae20716860870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24C5B 14884 bytes
font_02_sfnt_off00027a7c.bin
78cf723ebbd6e393ef72c7b4f1839595d1e52c56fece3093fd9c9487f2348db1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27A7C 14924 bytes
font_04_sfnt_off0002bab3.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAB3 6084 bytes
font_05_sfnt_off0002ca48.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA48 3752 bytes

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