Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31396147a11fea3…

MALICIOUS

PDF

184.8 KB Created: 2015-07-27 14:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 35843bcdb2135d1d785a5f07881a7f7f SHA-1: 285e194c5d0d42bc035715991e5cc3f48d43d83d SHA-256: a31396147a11fea3d91f0c964590949b1d0cc7d3ad7722c1c980dd9906e355b4
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector. The redirector URL is likely used to funnel users to a malicious website for phishing or malware delivery. 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=carsoft+mb+74+sp1+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B8%D0%B9+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4206/4206937_skachat_besplatnuyy_pley_market_na_nokia.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4227/4227920_instrukciya_k_programme_inversiya_21_vek.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4227/4227811_denis_semenihin_fitnes_yeto_legko_skachat.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a46b.bin
52569170580cc9ebdae4964dc2a20827f867ea4c11018a5814d267d04772ad4c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A46B 7208 bytes
font_00_sfnt_off00023bcb.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23BCB 3556 bytes
font_01_sfnt_off0002494e.bin
eed8954a637b789f211eace852f72daf231c65dfb9d1f7dfb4d190a9aaa9d96c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2494E 14952 bytes
font_02_sfnt_off000277e4.bin
b5f087bc7368b0c7a2a6a77770d29c8fafed86db905f3b4f66864124e2221ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x277E4 15236 bytes
font_04_sfnt_off0002b972.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B972 6084 bytes
font_05_sfnt_off0002c907.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C907 3752 bytes

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