Malicious PDF — malware analysis report

Static analysis result for SHA-256 584c1100d1cd5935…

MALICIOUS

PDF

37.0 KB Created: 2020-06-05 05:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9df1ccb495fd8b0f9779d913f29f75f2 SHA-1: b1b07fa1e8fea2e4dd1ec11ad170f42150b748c3 SHA-256: 584c1100d1cd593567fa36e36e83e9613576fe932718e217325a45dbe1f3c4d1
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, a technique often used for SEO poisoning or to redirect users to malicious websites. The PDF_SEO_LINK_FARM heuristic specifically identifies this pattern. The embedded URLs, such as http://lq.undesirable.us/uploads/1/3/0/4/130435834/130435834.html#dish+atencion+a+clientes+telefono+01 and http://huikupaadvlp.com/uploads/1/3/0/5/130540746/vozoxezivopa.pdf, are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lq.undesirable.us/uploads/1/3/0/4/130435834/130435834.html#dish+atencion+a+clientes+telefono+01
    • http://huikupaadvlp.com/uploads/1/3/0/5/130540746/vozoxezivopa.pdf
    • http://jetherington.com/uploads/1/3/0/3/130323612/2649200.pdf
    • http://creativerecycyling.com/uploads/1/3/2/3/132302912/5256605.pdf
    • http://marlive.mobi/uploads/1/3/0/6/130605193/botaz-foseluta.pdf
    • http://wadewestbrook.com/uploads/1/3/0/7/130776676/1394807.pdf
    • http://sylmargbla17.com/uploads/1/3/0/3/130313286/pulodirufef.pdf
    • http://beachgrassproperties.net/uploads/1/3/0/6/130621406/8233636.pdf
    • http://lq.undesirable.us/uploads/1/3/0/4/130435834/terms.html
    • http://lq.undesirable.us/uploads/1/3/0/4/130435834/dmca.html
    • http://lq.undesirable.us/uploads/1/3/0/4/130435834/policy.html
    • https://folefek.files.wordpress.com/2020/06/80055072985.pdf
    • https://nanesezup.files.wordpress.com/2020/06/notajabaloxofepav.pdf
    • https://gobuwitis.files.wordpress.com/2020/06/susitolavukuduzozazugel.pdf
    • https://lipegodubiv.files.wordpress.com/2020/06/93559188781.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_off00006211.bin
7a8392ced1baa334b7f34a58a29466eabdba3262d8d34f8d1e5096163a3e6516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 11368 bytes

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