Malicious PDF — malware analysis report

Static analysis result for SHA-256 a598b56dda8d52dc…

MALICIOUS

PDF

185.0 KB Created: 2015-08-08 09:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 22489da9282bbbb9e540cca7470830f4 SHA-1: c41abaf40203436ef151e3bbd9f0263b8d88bea0 SHA-256: a598b56dda8d52dc861debe927da447cda43b3bd74bc8f84ac19f8f9d3d7c54f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a critical heuristic for containing a link to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is likely part of a phishing or malware distribution chain. No scripts were extracted, and the document body was not parsable.

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%B1%D0%BE%D1%80%D0%BD%D0%B8%D0%BA+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%B3%D0%BE+%D1%80%D0%BE%D0%BA%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4259/4259725_servera_na_maynkraft_175_s_mini_igrami.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384378_klyuch_dlya_vindovs_7_maksimalnaya_64.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383852_skachat_chit_na_kristalluy_v_tanki_onlayn_bez_virusov_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023fb4.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23FB4 3556 bytes
font_01_sfnt_off00024d37.bin
11b9138a4fc9b1427d110831ac62b1ef3902397ce9b25620686e5cd65d2c4c62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24D37 15180 bytes
font_02_sfnt_off00027ce6.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27CE6 14468 bytes
font_03_sfnt_off0002a798.bin
5a9efa9ec591daa752d75124e7f23aa1231abfe11e96eaa0c3ab39c5b6368212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A798 6480 bytes
font_04_sfnt_off0002ba07.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA07 6084 bytes
font_05_sfnt_off0002c99c.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C99C 3752 bytes

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