Malicious PDF — malware analysis report

Static analysis result for SHA-256 1744ab8e0a62ab6c…

MALICIOUS

PDF

185.8 KB Created: 2015-07-24 11:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 7da29c70cb3e040c43abd7e6012e24b1 SHA-1: 1e71f12d6551b207c2fd0a176f4132fdebd162eb SHA-256: 1744ab8e0a62ab6cf6f129c6ed979c492ebbbf134b58e630080ee888551d3871
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. The document's authoring application, wkhtmltopdf, is not inherently malicious but can be used to generate malicious PDFs.

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%9A%D0%B0%D1%82%D0%B0%D0%BB%D0%BE%D0%B3+%D1%81%D0%BE%D0%B2%D0%B5%D1%82%D1%81%D0%BA%D0%BE%D0%B3%D0%BE+%D1%84%D0%B0%D1%80%D1%84%D0%BE%D1%80%D0%B0+1917+1991&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190744_tekstuy_dlya_spisuyvaniya_1_klass_po_fgos_shkola_rossii.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185254_oficialnuyy_sayt_asus_drayvera_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184717_dogovor_kupliprodazhi_avtomototransporta.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024618.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24618 3556 bytes
font_01_sfnt_off0002539b.bin
794767328b9f9ba8d2c0c0cbf82a02c49378303e4070ca28732a2043c928d9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2539B 13928 bytes
font_02_sfnt_off00027f72.bin
2d5eb0ca109a5046ee30620325dd08dfc5aa9f3803f0601f0f93391bdf64bd55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27F72 14512 bytes
font_03_sfnt_off0002aa55.bin
78ed45eab3565d1c9330c325d16dad2a56232782a545591720b3de805ba063c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA55 6644 bytes
font_04_sfnt_off0002bd65.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD65 6084 bytes
font_05_sfnt_off0002ccfa.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCFA 3752 bytes

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