Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b5893f4b3572ce…

MALICIOUS

PDF

186.1 KB Created: 2015-07-23 20:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: a93bc4431be644765d59b3b5c7e239af SHA-1: 35cde760956a6a818673fa3938f09441e26386ea SHA-256: a6b5893f4b3572cec3f0c2720155b4cfe72041c7e57b85eda27c43467bc890de
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of a malicious intent, likely for phishing or malware delivery.

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%BA%D0%B0%D1%81%D1%82%D0%B8%D0%BD%D0%B3+%D0%B2%D1%83%D0%B4%D0%BC%D0%B0%D0%BD%D0%B0+%D0%B2+%D1%80%D0%BE%D1%81%D1%81%D0%B8%D0%B8+%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//4183/4183243_urok_3.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184442_natalya_kosteneva_foto_v_zhurnale_maksim.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183246_model_idef0_primer.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024659.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24659 3556 bytes
font_01_sfnt_off000253dc.bin
b573706d2bedc73da424c65fcbc12c00239ed3c0a622141c5ac5104d829c541b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x253DC 14260 bytes
font_02_sfnt_off000280b5.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x280B5 14468 bytes
font_03_sfnt_off0002ab67.bin
dd7c49b6526d87d65ab02bf9b0b5b20ade81532e0c3c7c0fc69441ff587cca84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB67 6684 bytes
font_04_sfnt_off0002be97.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE97 6084 bytes
font_05_sfnt_off0002ce2c.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE2C 3752 bytes

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