Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f12a94c25b1c72d…

MALICIOUS

PDF

182.7 KB Created: 2015-07-24 05:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: dee52b6068b91d5e3bf608653f35e704 SHA-1: a31ed39a1bc28b47e3c6253a215c457bc29d7082 SHA-256: 3f12a94c25b1c72d919370d1adc98fbab1ff64898dfb025f1ab6a635764a39ea
90 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 known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/, is confirmed as a malicious redirector. No scripts were extracted, but the presence of a malicious link suggests a phishing or malware delivery attempt.

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=nod32+%D0%B4%D0%BB%D1%8F+windows+7&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185661_zhurnal_avtorskogo_nadzora_za_stroitelstvom_primer_zapolneniya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186594_skachat_barbi_sportivnaya_gimnastika_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185623_antimagnitnaya_nakleyka_kak_oboyti.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off00029f37.bin
acaa18a63fae42aa920c662124dcd4feea4411b6f461be14fb645c7c7d582728		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29F37 6324 bytes
font_00_sfnt_off000238fe.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x238FE 3556 bytes
font_01_sfnt_off00024681.bin
047d3869aedec15c928703577de2af0e3ccc9e786fcf37c34fc451c52e9c458d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24681 14380 bytes
font_02_sfnt_off000273e9.bin
6120f453c6d7ecc3a00a63869e020e1c84605cc57b782872c50099bea7f37df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x273E9 14636 bytes
font_04_sfnt_off0002b116.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B116 6084 bytes
font_05_sfnt_off0002c0ab.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0AB 3752 bytes

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