Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0efc172adcdcb5e…

MALICIOUS

PDF

29.6 KB Created: 2018-06-11 09:23:39 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9481af428c7eaa6e488c4e7ec6d42d75 SHA-1: d48525ec1b929ef43a451ef8dd35682111b43071 SHA-256: d0efc172adcdcb5ef8fec26bdaa1f11077d323bc894c08ac48da2c2288b260b2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier as malicious and specifically identified as a fake 'free download' SEO-poisoning lure. The document body contains URLs that redirect to a download page, strongly suggesting the intent is to trick the user into downloading a secondary payload. The presence of these malicious URLs and the SEO poisoning heuristic indicate a phishing attempt.

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=tai-chi-touchstones-yang-family-secret-transmissions-8th-edition.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=tai-chi-touchstones-yang-family-secret-transmissions-8th-edition.pdfIn PDF document text
    • http://www.egreenway.com/taichichuan/short.htmIn PDF document text
    • http://www.egreenway.com/taichichuan/classics.htmIn PDF document text
    • https://ipsum.im/In PDF document text
    • http://riverside-resort.net/1/the-making-of-a-land-the-geology-of-norway.pdfIn PDF document text
    • http://riverside-resort.net/1/the-american-gay-rights-movement-and-patriotic-protest.pdfIn PDF document text
    • http://riverside-resort.net/1/solution-probability-statistics-walpole-9th-edition.pdfIn PDF document text
    • http://riverside-resort.net/1/suzuki-xl7-manual-2008.pdfIn PDF document text
    • http://riverside-resort.net/1/the-new-aspect-of-the-woman-question.pdfIn PDF document text
    • http://riverside-resort.net/1/sketchup-8-manual-download.pdfIn PDF document text
    • http://riverside-resort.net/1/the-night-of-the-mary-kay-commandos-bloom-county.pdfIn PDF document text
    • http://riverside-resort.net/1/the-prophecy-the-prophecy-of-the-vikings-the-creation-of-the-world-pb-2001.pdfIn PDF document text
    • http://riverside-resort.net/1/transfer-solutions-ta-system.pdfIn PDF document text
    • http://riverside-resort.net/1/touring-bikes-a-practical-guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/Tai_chi_chuanIn PDF document text
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409In PDF document text
    • https://go.microsoft.com/fwlink/?linkid=868922In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=617297In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3828 10352 bytes
SHA-256: 3f29a86399ab9825a12aba517811cf83fbe997f0d030ad210f37570acf346953
font_01_sfnt_off00005920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5920 7572 bytes
SHA-256: fb68579de23cbdb3fef54e5aa7e50360355e08c483e4782f7edc65ee3a5ff9c4

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