Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5713bf7ad5b864d…

MALICIOUS

PDF

43.2 KB Created: 2020-04-06 05:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 72aea7d2b440fb05643c7b2aed75fb1f SHA-1: 1ac3f70f2650c4a029df80f6023d21d15397b3cf SHA-256: c5713bf7ad5b864d33042832e18e6abf61fc6fa17164604adc2ec3978cc9f749
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, indicating a link farm or redirection scheme. The primary heuristic identified a "PDF_SEO_LINK_FARM" which suggests the document's purpose is to generate traffic or distribute content through these numerous links. The document body, though partially corrupted, contains a URL that aligns with this pattern. No scripts were extracted from this sample.

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://reboundat.com/uploads/1/3/0/6/130620207/130620207.html#oraciones+con+close+en+pasado+participio+interrogativas
    • http://earthalchemyarts.com/uploads/1/3/0/9/130969562/b6c6466b1c.pdf
    • http://dashacademy.com/uploads/1/3/0/2/130272862/fagajevuk-xivil-sutuxuwo.pdf
    • http://cyberspacedetectives.com/uploads/1/3/0/3/130313082/7141853.pdf
    • http://westlondontrading.com/uploads/1/3/0/6/130620399/bopazavobetebuni.pdf
    • http://saferockford.org/uploads/1/3/0/7/130739924/zuperi.pdf
    • http://rocnifinland.net/uploads/1/3/0/8/130815664/29bdd0d39.pdf
    • http://drkristinaonline.com/uploads/1/3/0/3/130313178/9a6db1fee7b9b7.pdf
    • http://playaroundffc.com/uploads/1/3/0/6/130603983/segagutixaba.pdf
    • http://mta-sts.vafcs-aafcs.org/uploads/1/3/1/0/131070596/9016149.pdf
    • http://larson-homes.com/uploads/1/3/0/7/130775694/636587.pdf
    • http://bearsvsbabiesgame.com/uploads/1/3/0/8/130814421/0d5ec920e.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_off00007f15.bin
22d2f4d11b2569569fed9d5daa0f3c9f25d4104149b65877e3d8cae2efcd5cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F15 8964 bytes

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