Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f8b7de16183002…

MALICIOUS

PDF

37.5 KB Created: 2020-04-05 14:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4f4c961b2c658835740724a5376b92cd SHA-1: f650b59ff835122c67ebfd234d93124f549c9622 SHA-256: 91f8b7de1618300233f0e002459cfdb6129ae16d8540db6ade7f973a591e50bf
62 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text and a reference to 'wkhtmltopdf', indicating it was likely generated programmatically. The primary intent appears to be directing users to a network of external resources rather than delivering a direct payload.

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://sophrorelax.org/uploads/1/3/0/5/130538866/130538866.html#que+es+un+emulador+de+app+inventor
    • http://cnxtaiwan.com/uploads/1/3/0/2/130274370/jejakidi.pdf
    • http://goodie2019.com/uploads/1/3/0/4/130476035/kudored_takozer.pdf
    • http://realtorsbestplan.com/uploads/1/3/0/6/130640208/f20629dd33d.pdf
    • http://designingmoose.com/uploads/1/3/0/5/130551184/f507133fc4.pdf
    • http://twincitiesceremonies.com/uploads/1/3/1/3/131378988/ropumaxijanitaxeviti.pdf
    • http://randrbylinda.com/uploads/1/3/0/2/130289784/1797793.pdf
    • http://johnlgauthier.com/uploads/1/3/0/9/130969831/nemigafegodalo.pdf
    • http://ivhealth.com/uploads/1/3/0/4/130488699/baboneviserijawoze.pdf
    • http://minijarts.com/uploads/1/3/1/1/131164157/f57884e0.pdf
    • http://ccflcog.org/uploads/1/3/0/6/130622042/1318030.pdf
    • http://thebryansinc.org/uploads/1/3/0/2/130289172/302957.pdf
    • http://brothersafrik.com/uploads/1/3/0/7/130739533/3f5e0f3fc3c8.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_off000066f2.bin
b3d57957cf798b2ee939520f5fe9e4f1dea5255be14fcccb9c6879ec5beba4f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F2 8944 bytes

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