Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f2662e5ffb5d44…

MALICIOUS

PDF

183.8 KB Created: 2015-07-26 12:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: eaf79f611e1f6483977e08f4e90bd2ba SHA-1: 54967321ef07848af72601c78895eb3681f218c4 SHA-256: f2f2662e5ffb5d44131c0d90b747928a61c1d0a776e20d52dcacfb0d3eed4c05
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the embedded URL, which likely serves as a lure to a phishing or malware distribution site. 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=%D0%BA%D1%80%D1%8F%D0%BA+%D0%B4%D0%BB%D1%8F+%D0%B3%D1%82%D0%B0+4+%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%86%D0%B8%D0%B8&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184908_upstream_intermediate_b2_students_book_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4214/4214486_kwex_skachat_dlya_kopatel_onlayn.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4205/4205459_skachat_disk_pdd_belarus.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023cbd.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23CBD 3556 bytes
font_01_sfnt_off00024a40.bin
0100cf7c03ae62792163be3443e004ab9411f42cb85cd5cfff2dc88bf4d0fbf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A40 15116 bytes
font_02_sfnt_off00027902.bin
0d6c49bcbef1f65ca5e96f92b5d88c62510c2b9160c1e25cb4b3e80a774467e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27902 14468 bytes
font_03_sfnt_off0002a3b5.bin
8626a6490d7eb6a3c9ffaf5fd04883ed96f2476858f78adb49371b587a4c5ac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A3B5 6332 bytes
font_04_sfnt_off0002b585.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B585 6084 bytes
font_05_sfnt_off0002c51a.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C51A 3752 bytes

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