Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f331976785a8b0…

MALICIOUS

PDF

36.6 KB Created: 2020-04-28 09:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 64b82f07af60da9a9d2a32575e5a09ed SHA-1: 9c5317ca6aa581cec94935ab7065c37e8fd96daa SHA-256: c7f331976785a8b0724e46c95f50919a0a6639c6a8ef0f84bd02b6cbe7c8b57b
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, many pointing to other PDFs, indicative of a link farm or SEO spam campaign. One embedded URL, 'http://esperanzamassagetherapy.com/uploads/1/3/0/8/130874064/130874064.html#av+player+ios', is directly visible. The 'PDF_SEO_LINK_FARM' heuristic firing confirms the presence of numerous external links, suggesting a malicious intent to redirect users. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://esperanzamassagetherapy.com/uploads/1/3/0/8/130874064/130874064.html#av+player+ios
    • http://verdantseniorliving.com/uploads/1/3/0/3/130313176/remafifokaguv-neroxofusew-tibekuwuwexi.pdf
    • http://newceo.hplct.org/uploads/1/3/0/4/130476944/8092584.pdf
    • http://cmfamilypractice.com/uploads/1/3/0/4/130488604/161748e.pdf
    • http://emoccapitalpower.com/uploads/1/3/0/2/130291874/fujobegipuzefipamimu.pdf
    • http://metexasproperties.net/uploads/1/3/1/4/131482997/vapomidukos.pdf
    • http://blindtigerbarberco.com/uploads/1/3/1/4/131413766/206ee809c77fd.pdf
    • http://tmctransportes.com/uploads/1/3/0/4/130476141/rexatutor.pdf
    • http://melindagaskins.com/uploads/1/3/0/3/130313086/1160263.pdf
    • http://cessauctions.com/uploads/1/3/0/8/130874219/sigirefuwurafu-pebavodaxiluf-zilixupilavose-vedidaso.pdf
    • http://tempestbeautyllc.com/uploads/1/3/1/4/131453657/jemegav-deneputoluxe.pdf
    • http://cayleymanorhomeownersassociation.com/uploads/1/3/1/4/131407082/4945241.pdf
    • http://995silver.com/uploads/1/3/0/3/130313183/fafinilalizisukib.pdf
    • http://fantasygenetics.com/uploads/1/3/0/6/130621628/lozurusado-pirigasorem.pdf
    • http://cayleymanorhomeownersassoc
    • 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_off000066ad.bin
b37ba77ba50d1c925a0d586bdd90198820c48f71e76718abff24b546c2c6b45f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AD 8372 bytes

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