Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e7d2d3f77f6539…

MALICIOUS

PDF

38.9 KB Created: 2020-03-29 05:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a4c831c44d76552ded04fe021f0e55da SHA-1: 5cb525ebb12e8f8f098f6098b719e69a8b7ceb35 SHA-256: a9e7d2d3f77f6539ae990980e02e13fe34f86c270b6c80de04c22b9938b4048d
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. The document body, though partially corrupted, contains text suggesting an 'ebook free download' lure, which is consistent with the heuristic firing of PDF_SEO_LINK_FARM. The primary external URI points to an HTML file, likely a landing page for the download. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://74-123-77-227.mgwnet.com/uploads/1/3/1/3/131380171/131380171.html#html+and+css+ebook+free+download
    • http://boost.reachfortomorrow.org/uploads/1/3/0/5/130542977/0222fd55.pdf
    • http://theglenrockhive.com/uploads/1/3/0/6/130604962/bekoxiredupugutevize.pdf
    • http://www.brimscar.com/uploads/1/3/0/2/130289386/pabobi.pdf
    • http://modernmobilemarketing4u.com/uploads/1/3/0/4/130476150/2185851.pdf
    • http://vrarcadeconference.com/uploads/1/3/0/6/130621809/3425695.pdf
    • http://engadycinevideo.com/uploads/1/3/0/2/130272278/viwuzasopexalipix.pdf
    • http://www.ceoyear.com/uploads/1/3/0/5/130589182/pafefaz.pdf
    • http://queenhollins.com/uploads/1/3/0/6/130639337/6083308.pdf
    • http://arkconsultancyinc.net/uploads/1/3/0/7/130776222/2dd50.pdf
    • http://vagabondnetworks.us/uploads/1/3/0/2/130289288/bc841.pdf
    • http://artloversinn.com/uploads/1/3/0/2/130270977/gabawuxaxal.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/6/130604226/1161607.pdf
    • http://sskentertainment.com/uploads/1/3/0/8/130874286/tobuvapukejijon_kujizafu.pdf
    • http://medios21.com/uploads/1/3/0/6/130639628/xunageravoxoguke.pdf
    • http://equitylane.com/uploads/1/3/0/5/130550797/bitep_waxamada_viposuzakezogom_fivozufedase.pdf
    • http://fucd.life/uploads/1/3/0/8/130873868/63848ebdd.pdf
    • http://braxtonohana.com/uploads/1/3/0/9/130969775/wowowiwinovune-bilowil-tawasugaru-fojaxi.pdf
    • http://u-ehs.com/uploads/1/3/0/8/130813831/3188730.pdf
    • http://saltwaterfinaddicts.shop/uploads/1/3/0/4/130488698/8600882.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007053.bin
486e251fcedcf32428f62a5e68cfddb37f994a26e511fe61b4b525e5d944974e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7053 7568 bytes

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