Malicious PDF — malware analysis report

Static analysis result for SHA-256 a291b8df1e813ce7…

MALICIOUS

PDF

42.9 KB Created: 2020-03-16 17:10:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bf45f07b8c514094635936f9a8f336a8 SHA-1: 44c2723ed2d41309ef356d4deddb9d4ccc895b78 SHA-256: a291b8df1e813ce7df743f8edfc2b23a2aed763c4ed0074b8d954e2e24f8f999
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The embedded URLs and the PDF_SEO_LINK_FARM heuristic firing confirm the presence of a link farm designed to lure users or influence search results.

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://ebmccallanbuildingltd.com/uploads/1/3/0/8/130813558/130813558.html#shooting+an+elephant+annotations+pdf
    • http://pottshopp.com/uploads/1/3/0/6/130603747/6a14a410ff1d8a.pdf
    • http://almansweide.nl/uploads/1/3/0/7/130739375/roxixuratofakoz-dewexod-zamusinevojale.pdf
    • http://xcalligraff.com/uploads/1/3/0/6/130604141/timofewatozepu_joxijenut.pdf
    • http://browntherapylincolnne.com/uploads/1/3/1/0/131071231/manuvema-mekixamobimire-lubovab.pdf
    • http://www.solcreative.co.nz/uploads/1/3/0/6/130621161/nolavenemukerexema.pdf
    • http://www.avilabankruptcylaw.com/uploads/1/3/0/6/130639423/rexabekagu.pdf
    • http://weed-feed.me/uploads/1/3/0/4/130476733/6582684.pdf
    • http://artm.website/uploads/1/3/0/3/130323616/nuzobasasudus.pdf
    • http://trueleadershipconference.com/uploads/1/3/0/4/130488265/4491f439e383e65.pdf
    • http://sirhall.com/uploads/1/3/0/6/130604620/vinopax-xagimare.pdf
    • http://curbappealhomeremodeling.com/uploads/1/3/0/7/130775031/xumapakekejusuwuz.pdf
    • http://www.drwpools.com/uploads/1/3/0/8/130814669/vomaxo.pdf
    • http://rebuildcm.co/uploads/1/3/0/7/130776754/4017f8adc10f.pdf
    • http://cidalcyc.com/uploads/1/3/0/6/130639668/88e5c.pdf
    • http://nbalovin.com/uploads/1/3/0/5/130588931/wivevibudemas.pdf
    • http://repnstep.net/uploads/1/3/0/7/130739945/xipodalofisorir-dalinanipori.pdf
    • http://cookielovecustomsugarcookies.com/uploads/1/3/0/2/130288571/2942905.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_off0000810a.bin
f5d2d883290909fb254728abff4ae2fa31e7e781f995a2b750b88f48b495c2e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810A 7648 bytes

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