Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a57ef01940f134e…

MALICIOUS

PDF

185.2 KB Created: 2015-08-05 14:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f5ce66dad5cc316775c10ec8bc86cd51 SHA-1: 65342c7b20d784d956c33cd344712832294d07eb SHA-256: 3a57ef01940f134e6b9d4fa18675a8ccfe9368e08935c6dc4972d9129510cb2d
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector. The embedded URL `http://botcraftman.ru/?lip&keyword=%D1%8F%D0%B2%D0%B0+%D1%81%D0%BA%D1%80%D0%B8%D0%BF%D1%82+%D0%BF%D1%80%D0%B8%D0%BC%D0%B5%D1%80%D1%8B&charset=utf-8` is the primary indicator of malicious intent. No scripts were extracted, limiting further analysis of the payload delivery mechanism.

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%8F%D0%B2%D0%B0+%D1%81%D0%BA%D1%80%D0%B8%D0%BF%D1%82+%D0%BF%D1%80%D0%B8%D0%BC%D0%B5%D1%80%D1%8B&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304531_paper_artist_skachat_na_android.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304578_blagodarstvennoe_pismo_studentu_obrazec.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304512_recept_plova_v_multivarke_polaris_0508d.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_046_off00024fc6.bin
0b73e1dc65eaad27041093afa01297278a89cdafff1adf934a2b70260f000492		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x24FC6 15128 bytes
font_00_sfnt_off00024243.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24243 3556 bytes
font_02_sfnt_off00027e27.bin
3273cb9e3604a95d59a6869e315bda2b27385e5efacf4970fd9df35e30fffd2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27E27 14604 bytes
font_03_sfnt_off0002a949.bin
c53954b3a121ad078c4f400e58457b2523036eea24dc9201dffe9c66042526bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A949 6324 bytes
font_04_sfnt_off0002bb21.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB21 6084 bytes
font_05_sfnt_off0002cab6.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CAB6 3752 bytes

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