Malicious PDF — malware analysis report

Static analysis result for SHA-256 86409a4aa3265068…

MALICIOUS

PDF

51.3 KB Created: 2020-03-28 11:02:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b9ff4efd7c8ab954ee7bd9be4786b060 SHA-1: 859bd77bc0518b4a518fc120ddfcbc403d8208f6 SHA-256: 86409a4aa32650685bb4f873c8db9572825c8e50bb5751ccb84c29a27025cbc0
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 hosted on similar domains. The primary link suggests a lure to download a game, likely a pretext for delivering malware. The ML classifier strongly indicates maliciousness, and the PDF structure with numerous external links points to a link farm or redirection strategy.

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://priscalia.com/uploads/1/3/0/2/130287542/130287542.html#download+game+java+320x240+dedomil.net
    • http://leckronstudios.com/uploads/1/3/0/6/130603966/b758fc.pdf
    • http://countryseasonsbnb.com/uploads/1/3/0/8/130814874/kafefalivex_galuzilikoresin_sixuf.pdf
    • http://gardenscool.com/uploads/1/3/0/6/130620997/5418bf9d95989.pdf
    • http://www.leanonmeconcierge.com/uploads/1/3/0/8/130815095/fesaxabo.pdf
    • http://sphrubc.ca/uploads/1/3/0/5/130543169/tejede.pdf
    • http://cedarhawthone.studio/uploads/1/3/0/6/130604749/tuxomuvagusezi.pdf
    • http://nfynia.com/uploads/1/3/0/3/130313306/fabomedanekaxir_xilavolifuxezi.pdf
    • http://site.diamantinc.ca/uploads/1/3/0/4/130489168/batide_wesokuwedafuv_pipage_rujef.pdf
    • http://www.leemedlynhomeofbottles.com.au/uploads/1/3/0/7/130776325/sumavuxuwow.pdf
    • http://sh8kmusic.com/uploads/1/3/0/3/130313376/putax_vazanesi_gokoduraja_mijagat.pdf
    • http://pro-perform.org/uploads/1/3/0/2/130289353/bufuru.pdf
    • http://www.happyvalleyhomesolutions.com/uploads/1/3/0/5/130551267/kilipavebura-tasutu.pdf
    • http://www.tdforus.com/uploads/1/3/0/4/130483305/sobibesa.pdf
    • http://openparadigma.org/uploads/1/3/0/8/130874038/f458e.pdf
    • http://haddensayersband.com/uploads/1/3/0/7/130775265/pedukoluxi-zeketad.pdf
    • http://www.ecowaterconcretetanks.com.au/uploads/1/3/0/7/130775023/kuliradiroluzop-zonirujugodek-kavuvuwaxa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007844.bin
5942e3e949b99eeacbf79e7dae61c77455823670542b22b22312e9779cd25e1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7844 13436 bytes
font_01_sfnt_off0000a19e.bin
94c96a8754daaa095bb74c17f682d0cd07e6ee8f5d11466f21ac4011061da200		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA19E 21468 bytes

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