Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7116ce19009a5a…

MALICIOUS

PDF

185.0 KB Created: 2015-08-08 11:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b1fa4d9519ee0223c2e12143d34a736b SHA-1: 558d408cc9b252b714128751cf7a33bd4b3de23a SHA-256: 4f7116ce19009a5ac0b7428b44008b4c51f53f63afdb61718275aa680778a899
92 Risk Score

Malware Insights

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

The PDF file 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 compromise. No scripts were extracted, and the document body was not parsable text, limiting further analysis of the specific lure.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B4%D0%B8%D0%BA%D1%82%D0%BE%D1%84%D0%BE%D0%BD+%D0%B4%D0%BB%D1%8F+%D0%BA%D0%BE%D0%BC%D0%BF%D1%8C%D1%8E%D1%82%D0%B5%D1%80%D0%B0&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384141_skachat_besplatno_knigi_borisa_akunina.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4387/4387876_reshenie_zadach_po_matematike_2_klassa_planeta_znaniy.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385340_trigonometriya_10_klass_telyakovskiy_gdz_onlayn.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024151.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24151 3556 bytes
font_01_sfnt_off00024ed4.bin
52822cf1bcdbc76efe86fb783320d15441102c3421c1aaa5fcd67c6d9b1b488f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24ED4 14260 bytes
font_02_sfnt_off00027ba9.bin
4ae165705ecc41720893a92c6e94e3ee89b3be36a12e4a920505046f59c61edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BA9 14468 bytes
font_03_sfnt_off0002a657.bin
c4dc39a862d81aa24d21bfb9b859c7ffac355a2a669f8a2e55cb4df25899714e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A657 6836 bytes
font_04_sfnt_off0002ba17.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA17 6084 bytes
font_05_sfnt_off0002c9ac.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9AC 3752 bytes

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