Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba44b17c8c0382c0…

MALICIOUS

PDF

47.3 KB Created: 2020-03-25 10:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 94fb6d8c8ce4cfd6a78f0c82edf37358 SHA-1: f35edf89e058a6896ab779ae746b95e41042f85e SHA-256: ba44b17c8c0382c0dda28ab557f151b0e57babffd46edd27233977b9fbabee24
62 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The document body contains garbled text and some recognizable strings related to temperature conversion and the authoring application, but no clear user-facing lure. The primary malicious activity appears to be the mass distribution of external links, likely to manipulate search engine rankings or to serve as a landing page for further malicious activity.

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://noroplan.com/uploads/1/3/0/5/130588733/130588733.html#temperature+conversion+kelvin+celsius+fahrenheit
    • http://tanglewood-ranch.com/uploads/1/3/0/5/130546040/6409156b67ac.pdf
    • http://bqmanagerllc.com/uploads/1/3/0/4/130489563/8609028.pdf
    • http://boldamerica.us/uploads/1/3/0/6/130639283/2812796.pdf
    • http://www.valholl.net/uploads/1/3/0/8/130874050/5605534.pdf
    • http://kittybegood.com/uploads/1/3/0/6/130620579/9130788.pdf
    • http://bgmethodist.org/uploads/1/3/0/2/130289561/e41c5c1d6c0.pdf
    • http://pilladoporlaesgrima.com/uploads/1/3/0/7/130775539/pilepukoralutejotan.pdf
    • http://equusdesigns.com/uploads/1/3/0/7/130776253/mixematedukazufesipa.pdf
    • http://lauralepre.com/uploads/1/3/0/8/130873941/6338838.pdf
    • http://aftercareusa.studio/uploads/1/3/0/2/130274154/5855876.pdf
    • http://onehothalpino.com/uploads/1/3/0/5/130589008/3e43381e649b4.pdf
    • http://accidentallyorganized.com/uploads/1/3/0/7/130739399/9014682.pdf
    • http://efinicaragua.org/uploads/1/3/0/5/130589241/razuzagapi.pdf
    • http://teshekpuklake.com/uploads/1/3/0/4/130488888/toleresaduno.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_off00008f4a.bin
be286f248e1703043080d9d981337de44c48d21a97e93104127f9d0029f75eb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4A 8552 bytes

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