Malicious PDF — malware analysis report

Static analysis result for SHA-256 8919630f1e2c8d55…

MALICIOUS

PDF

186.9 KB Created: 2015-07-24 11:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b239778bc4307aedee92809876987e4b SHA-1: e325dbafc5ac40a3c9796c561f22269929f2a686 SHA-256: 8919630f1e2c8d55a675f39de8140d046410a0670b35db530d15e900967776ae
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a critical heuristic for containing a malicious redirector link. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/, is associated with malicious redirector infrastructure, likely serving as a lure for users to download malicious content. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

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=sun+java+plugin+1624+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191985_skachat_zhivuye_oboi_dlya_windows_7_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184554_sims_3_polnaya_antologiya_19_v_1_skachat_torrent_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190955_kalkulyator_kodov_razblokirovki_magnitol.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_off0002427d.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2427D 3556 bytes
font_01_sfnt_off00025000.bin
db5874290b2dc4e22bad69df115ab1719bdd1e0789cdc8d7549ec530a8074cd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25000 15364 bytes
font_02_sfnt_off00027f7a.bin
eb5d3ae88dfc211714e58d9ddf67171c29419c0fab63517b2164e74444f10c14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27F7A 14824 bytes
font_03_sfnt_off0002ab57.bin
3572d7cadbbc458b03fcc21bdc97eb8f05396eaded78b326e19ff62c22e62bb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB57 7608 bytes
font_04_sfnt_off0002c1bc.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1BC 6084 bytes
font_05_sfnt_off0002d151.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D151 3752 bytes

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