Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7fcba73a8f84fd…

MALICIOUS

PDF

183.3 KB Created: 2015-08-06 14:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6) First seen: 2021-10-05
MD5: 7c4ba22840575b494591ceed1161996c SHA-1: 0d2469f65147a94ef6b53ec352ea4fbd5f2c1101 SHA-256: cb7fcba73a8f84fd7ebf9add0e8fa01f4ec1d7e4c069a95b9fc24857587bc903
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded link that is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The link likely leads to a site designed to host further malicious content or phishing pages. No scripts were extracted, but the presence of a malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 3

  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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%BB%D1%83%D1%87%D1%88%D0%B8%D0%B5+%D0%BC%D0%BE%D0%B4%D1%8B+mount+and+blade+warband&charset=utf-8 In PDF document text
    • http://fastpic.ru/In PDF document text
    • http://www.liveinternet.ru/clickIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4308/4308211_olga_gromuyko_vernuye_vragi_skachat.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304850_igra_1000_dverey_skachat_besplatno.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4310/4310823_prohozhdenie_stalker_gluhar_2.pdfIn PDF document text
    • http://www.microsoft.com/typography/fonts/In PDF document text
    • http://www.microsoft.com/typography/fonts/YouIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24009 3556 bytes
SHA-256: 880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281
font_01_sfnt_off00024d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24D8C 14668 bytes
SHA-256: e01f018ae8e0aaca79405f4bb1177bfc0d3fa0f90499c263d4a5af7a561408ec
font_02_sfnt_off00027aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27AEC 15004 bytes
SHA-256: 1f97b912b5816700d94fd2524bb3c7bfc07c192b51f53c542856cffeacc8aeca
font_03_sfnt_off0002a732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A732 7072 bytes
SHA-256: 1bcffa5dd10b95f3ca1c50513318abd1c6e69d744a0458578a9b84a46a0a2262
font_04_sfnt_off0002bbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBCA 6084 bytes
SHA-256: 819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3
font_05_sfnt_off0002cb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB5F 3752 bytes
SHA-256: 9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e

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