Malicious PDF — malware analysis report

Static analysis result for SHA-256 0115a5b79a7fa502…

MALICIOUS

PDF

28.9 KB Created: 2018-06-11 09:57:53 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 9e8313f83ab7f591d793bbbaa6d48b06 SHA-1: 9572b124db331828266cb3ffcbd385031d844def SHA-256: 0115a5b79a7fa502e9db43008f52e6acd4246254e3f5a840b08d5b50c15bf27d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566 Phishing T1204.002 Malicious Link: Malicious File

This PDF file was flagged by a machine learning classifier as malicious and contains heuristics indicating it is a fake download lure. The document body and embedded URLs point to a domain designed to trick users into downloading a file, likely a payload, under the guise of car-related information. The primary malicious domain identified is uncpbisdegree.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9718

Heuristics 4

  • Fake 'free download' SEO-poisoning PDF critical PDF_SEO_FAKE_DOWNLOAD
    The ML classifier flagged this PDF AND it carries a visual download/call-to-action lure AND an off-domain server-side download-gateway link whose query string names a document payload. This three-signal conjunction is the fake-document / 'free PDF download' SEO-poisoning delivery pattern: the page is padded with benign decoy links to dilute classifier scores while funnelling the victim through the gateway to malware/scareware. Acting only on the conjunction keeps benign download-bearing PDFs from being misflagged.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://uncpbisdegree.com/download3.php?q=toyota-corolla-w58814.pdf
    • http://uncpbisdegree.com/download4.php?q=toyota-corolla-w58814.pdf
    • http://www.ycarlink.com/pd_10512_USB-Car-Stereo-Adapter-MP3-AUX-Bluetooth-interface-CD-Changer-for-Toyota-Lexus-Scion-Small-6-6-plug-2003-2013.htm
    • http://teletehnika.info/collection-of-sockets-autoradio/136-razyomy-amagnitol-toyota.html
    • http://usbadapter.ru/goods/USB-%D0%B0%D0%B4%D0%B0%D0%BF%D1%82%D0%B5%D1%80-yatour-YT-M06-TOYOTA-6-6
    • https://www.radio-defekt.de/
    • http://uncpbisdegree.com/1/self-care-cards.pdf
    • http://uncpbisdegree.com/1/test-form-b-geometry-pearson-prentice.pdf
    • http://riverside-resort.net/1/visage-deluxe-foot-spa-with-heat.pdf
    • http://uncpbisdegree.com/1/solution-manual-an-intermediate-course-in-probability.pdf
    • http://uncpbisdegree.com/1/selected-correspondence-of-kenneth-patchen.pdf
    • http://riverside-resort.net/1/university-of-chicago-working-papers-in-linguistics-a-collection-of-articles.pdf
    • http://riverside-resort.net/1/www-aku-edu-pk.pdf
    • http://uncpbisdegree.com/1/the-fathers-know-best-your-essential-guide-to-the-teachings-of-the-early-church.pdf
    • http://uncpbisdegree.com/1/stalking-the-divine-contemplating-faith-with-the-poor-clares.pdf
    • http://riverside-resort.net/1/wooing-his-mate-lycan-romance.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=RU_EN&a=http%3a%2f%2fteletehnika.info%2fcollection-of-sockets-autoradio%2f136-razyomy-amagnitol-toyota.html
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=RU_EN&a=http%3a%2f%2fusbadapter.ru%2fgoods%2fUSB-%25D0%25B0%25D0%25B4%25D0%25B0%25D0%25BF%25D1%2582%25D0%25B5%25D1%2580-yatour-YT-M06-TOYOTA-6-6
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=DE_EN&a=https%3a%2f%2fwww.radio-defekt.de%2f
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409
    • https://go.microsoft.com/fwlink/?linkid=868922
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409
    • http://go.microsoft.com/fwlink/?LinkID=617297
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003723.bin
3e191915cf88b750359371d3666b6896eedf1cce1ef3979974ac2624b5717e7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3723 10024 bytes
font_01_sfnt_off0000571d.bin
4109dc516dc416e7a1d1ede4e88c13c30a9dcabad6dd916e5cc99ee618461ab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x571D 7180 bytes

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