Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc6b9210c9688fd…

MALICIOUS

PDF

82.3 KB Created: 2020-03-29 12:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a11bb2df1fb48469cf7431eb9a828033 SHA-1: 2e8a92db073ef34a94f359254626fdf23e182e6c SHA-256: 8dc6b9210c9688fd80889c4be2d7b49a16c7b4186fb74be739f04bb48fa4db0f
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a common technique for SEO poisoning and driving traffic to malicious sites. The document body, though partially corrupted, includes a URL that appears to be part of this link farm. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host a link farm for SEO purposes, likely to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jessica-and-jaso-1.rominastiebenphotography.com/uploads/1/3/0/6/130604666/130604666.html#continente+mas+largo+del+mundo+ubicado+en+mexico
    • http://trillajayyy.com/uploads/1/3/0/5/130543010/dbd95.pdf
    • http://newenglandcanna.com/uploads/1/3/0/8/130874593/pubobifam-vurejobibef-losidokuwula-zibajutonopa.pdf
    • http://srbrc.org/uploads/1/3/0/4/130483879/koxokax-xaxijaxe-bipeberi.pdf
    • http://mikeconstruction.org/uploads/1/3/0/5/130540405/05c6a9f.pdf
    • http://palmerallen.net/uploads/1/3/0/2/130291588/3245102.pdf
    • http://kristinerinartistry.com/uploads/1/3/0/6/130621928/dadujotu.pdf
    • http://medschoolcompanion.org/uploads/1/3/0/6/130620382/lapuduw_xeloloruxulufil_zumupo.pdf
    • http://streetsanddrinks.com/uploads/1/3/0/2/130270900/jabisad.pdf
    • http://mslegalmojacar.com/uploads/1/3/0/6/130621273/31d552699fd.pdf
    • http://payperlessforms.com/uploads/1/3/0/6/130639410/darataxenotirek.pdf
    • http://dfwdirectory.com/uploads/1/3/0/7/130738497/4414738.pdf
    • http://elisabethkbutler.com/uploads/1/3/0/8/130813135/muxawubuzijeleve.pdf
    • http://premium-solar.com/uploads/1/3/0/5/130590339/4818214.pdf
    • http://emt-tester.co/uploads/1/3/0/6/130620251/kalawejaxado.pdf
    • http://ancient-hearts.com/uploads/1/3/0/4/130476152/vazipabazunelesenoj.pdf
    • http://peterboonkoh.com/uploads/1/3/0/4/130483407/224e7ec.pdf
    • http://jeubanksmd.com/uploads/1/3/0/5/130538994/jezidobekiritirab.pdf
    • http://morningrosehouston.com/uploads/1/3/0/6/130639852/7195304.pdf
    • http://frewin.app/uploads/1/3/0/6/130621313/zetoratedera-zopiwa-pejikid-zemukini.pdf
    • http://glamstyleny.com/uploads/1/3/0/8/130813511/f316887.pdf
    • http://alanbonilla.com/uploads/1/3/0/9/130969801/3503f.pdf
    • http://obgynassociatespc.com/uploads/1/3/0/2/130272859/vipimijaxarupif-zulidufivaradek-gikodedimikajet.pdf
    • http://codelessweb.com/uploads/1/3/0/3/130323511/zodad.pdf
    • http://indi-vibes.com/uploads/1/3/0/7/130776032/zadumasonexof.pdf
    • http://lg-consultants.net/uploads/1/3/0/7/130740213/3505b4994b3eec.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e651.bin
466f07074ac2c6783cfd8d2d389b5350296cf8f810045576f87a65cfcf783613		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE651 10752 bytes
font_01_sfnt_off00010bde.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDE 4144 bytes
font_02_sfnt_off000118d7.bin
4cda5f785b161ab6df9682e6368fd2c101e9aa902a3f31947a361fc50cf1a95c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118D7 2732 bytes
font_03_sfnt_off0001228e.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1228E 16036 bytes

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