Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c938c76394bf3d…

MALICIOUS

PDF

40.6 KB Created: 2020-04-03 07:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 984353abe913fd5d3ca25e790d76a070 SHA-1: 40a6c899c31f223406e870c2d4fcc7d5ff4cb33b SHA-256: d1c938c76394bf3dd5c76306f691959e3973985975be6e95c656cd413124570e
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The document body text, though partially corrupted, includes a lure for downloading a game, and one of the extracted URLs is a direct link to a PDF file. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

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://thebeautyboxllc.com/uploads/1/3/0/5/130589220/130589220.html#descargar+crash+bandicoot+para+pc+sin+emulador
    • http://mountedcharger.com/uploads/1/3/0/2/130288565/f5da0b.pdf
    • http://harecutz.net/uploads/1/3/0/3/130379824/zawirobozadus.pdf
    • http://thecolororacle.com/uploads/1/3/0/5/130540293/purapaluxi-tijobew.pdf
    • http://pizzamila.net/uploads/1/3/1/4/131407324/tejewawitotid.pdf
    • http://rellgotembeats.com/uploads/1/3/0/7/130740536/dijanom.pdf
    • http://www.carollowery.com/uploads/1/3/1/4/131437233/964377.pdf
    • http://servicedelocation.org/uploads/1/3/0/7/130776873/levokofov.pdf
    • http://bestseminoletreeservice.com/uploads/1/3/0/2/130272369/guwabupat_wunapepureva_nenodilisugofap.pdf
    • http://craftsmanplumbing.net/uploads/1/3/0/4/130476047/f85e56ff9896332.pdf
    • http://ezkandhulamusic.com/uploads/1/3/0/9/130969645/82bc1539.pdf
    • http://www.ritewaytampa.com/uploads/1/3/0/6/130621751/280353.pdf
    • http://magnoliagmeaa.org/uploads/1/3/0/6/130639956/13c456942e08f1.pdf
    • http://sophievmakeupartiste.com/uploads/1/3/0/4/130435956/vofubuwujige.pdf
    • http://light-snowboards.de/uploads/1/3/0/6/130604148/7fcd92.pdf
    • http://ariannaarman.com/uploads/1/3/0/3/130379319/latibaguza.pdf
    • http://sheffieldrendering.net/uploads/1/3/0/7/130775174/38677d23473d.pdf
    • http://thecommunicationacademy.org/uploads/1/3/1/4/131407695/fukitogetema.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_off00007506.bin
a4788e039a2ad98cdf93717e2dc15f42444c67e0778d60f4fad1d43bcb419c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7506 8672 bytes

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