Malicious PDF — malware analysis report

Static analysis result for SHA-256 c446bc5e39af7164…

MALICIOUS

PDF

185.0 KB Created: 2015-07-24 11:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9c0443fb57f7a212de77b62c36e6acde SHA-1: 6ba95ffd1d1603323693ed6b1c91ff553836e495 SHA-256: c446bc5e39af71647770e42609b32b6a48a23fd82d23c830ea175a0d805c3418
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, botcraftman.ru. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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+auslogics+boostspeed+c+%D0%BA%D0%BB%D1%8E%D1%87%D0%BE%D0%BC&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191589_rezultatuy_gia_po_russkomu_yazuyku_2015_altayskiy_kray.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189005_canon_ds126291_instrukciya.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187424_skachat_knigu_50_ottenkov_serogo_2_chast_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a412.bin
c93aaa9f1741fb05dbe733fee18466fb0e649c9f868fe59858d2cc3dd0a8862d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A412 7496 bytes
font_00_sfnt_off00023e5f.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23E5F 3556 bytes
font_01_sfnt_off00024be2.bin
29fbcd15d9c0fc5f023c851350296cd85896c33f658b8beaa7271126f7012498		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24BE2 14440 bytes
font_02_sfnt_off000278a2.bin
aed14c728d456e9444a11ff770e42b489df34f6b51926a9781beead2ace4f81b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x278A2 14712 bytes
font_04_sfnt_off0002ba1c.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA1C 6084 bytes
font_05_sfnt_off0002c9b1.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9B1 3752 bytes

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