Malicious PDF — malware analysis report

Static analysis result for SHA-256 157ed771a8d0da5b…

MALICIOUS

PDF

184.1 KB Created: 2015-07-25 00:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 953eb32d8fa1d3fb97007dd6f70086f4 SHA-1: 4ea0d488fccc1fa7da73a4a131b2c782bb85b581 SHA-256: 157ed771a8d0da5b221b6fc9e0c3914338c4a7866fe124f393de3b632102ef6f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a critical heuristic for linking to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/, is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the presence of a malicious URL suggests an attempt to redirect the user to a harmful 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%9E%D0%94%D0%AB+%D0%BF%D1%83%D0%BB%D1%8C%D1%82%D0%B0+huayu+HR-159E&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4194/4194877_proekt_naruzhnogo_osvescheniya_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186302_skachat_fayl_dlya_rezyume.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191434_interesnuye_zadaniya_po_matematike_dlya_6_klassa.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023b89.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23B89 3556 bytes
font_01_sfnt_off0002490c.bin
3384465eb9b9fb5293186e163c25e8918a7f2d8c3cbb5665367d49e5ae964a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2490C 15020 bytes
font_02_sfnt_off000276ce.bin
f85ce98b1d2e6ce5903e0493092729f333d1ad190874b696854bb87748f8644f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x276CE 14796 bytes
font_03_sfnt_off0002a23b.bin
3652545affb2dd9651d5a71fec3d17cbc6d28b5462d5d95c1c247afa4f13e496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A23B 6964 bytes
font_04_sfnt_off0002b66c.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B66C 6084 bytes
font_05_sfnt_off0002c601.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C601 3752 bytes

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