Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88e634acad573bf…

MALICIOUS

PDF

39.8 KB Created: 2020-04-23 03:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 02172805a23b416870542e194b084143 SHA-1: 85fd29cac0bddb973e6cf6fe03a7348461ebb247 SHA-256: b88e634acad573bf102c85bba095dbaf822514c985cf4a82f989f9bb378eeaf7
92 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains text related to 'free 50th birthday invitations templates' and mentions 'wkhtmltopdf', suggesting a lure to a site hosting potentially harmful content. 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://medicalcbdlabs.com/uploads/1/3/0/6/130640164/130640164.html#free+50th+birthday+invitations+templates
    • http://salanderagency.com/uploads/1/3/0/4/130483939/2914278.pdf
    • http://makinscentscandlesandcrafts.com/uploads/1/3/0/5/130551756/xazobonizidotol.pdf
    • http://yorkaccesssystems.com/uploads/1/3/0/5/130590589/zomoxasupexamag.pdf
    • http://benthusiasm.com/uploads/1/3/1/6/131606951/bc668d1.pdf
    • http://orlandoaccidentlawyer.net/uploads/1/3/0/8/130873945/dapamedoni.pdf
    • http://littlejoesjanitorialrental.ca/uploads/1/3/0/4/130488615/7336996.pdf
    • http://popdesignsmarket.net/uploads/1/3/1/6/131606000/1442a311e26.pdf
    • http://joybreland.com/uploads/1/3/0/5/130544257/03410.pdf
    • http://buildconstructiondesign.com/uploads/1/3/1/4/131453321/bevol-mezujonegim.pdf
    • http://interact6380.org/uploads/1/3/0/3/130312980/b9c768c.pdf
    • http://executivepsychic.com/uploads/1/3/1/4/131437776/6913131.pdf
    • http://gmjewerly.com/uploads/1/3/0/7/130775138/pevodaguxano-rolatevotozi-niliperi.pdf
    • http://joybreland.c
    • 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_off00007891.bin
97f51305806639d2540468e5cfd9d40427058c63d2442c08eefb621086d26e05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 6672 bytes

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