Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7679eeabf3d32a…

MALICIOUS

PDF

48.8 KB Created: 2020-03-24 19:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7b6d2a57b5fc19fa828af94bb3f2144c SHA-1: 0e0278ae2f8c936dc41a0ee0bc2430b9e3482372 SHA-256: 3f7679eeabf3d32ada8284557dfb60d66cb2f8f99996594b1612280127c3c914
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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text and some of the extracted URLs, reinforcing the idea that the primary purpose is to redirect users to external content. 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://peakathleticsystems.com/uploads/1/3/0/8/130814186/130814186.html#what+is+the+difference+between+escape+and+interpretive+literature
    • http://pourspoutequipment.net/uploads/1/3/0/8/130874194/rekovaxomeb.pdf
    • http://www.duanzhihong79.com/uploads/1/3/0/7/130738902/3082950.pdf
    • http://summitagmanagement.com/uploads/1/3/0/5/130588433/xigotugajos.pdf
    • http://oursecret.hu/uploads/1/3/0/6/130639055/4550844.pdf
    • http://www.elitesoundandlight.com/uploads/1/3/0/6/130620572/jutekeluvup-jatobez-wokafupim-duzavidopaz.pdf
    • http://www.ilenegillispie.com/uploads/1/3/0/4/130489248/9dd6f4.pdf
    • http://silhouettemedispa.com/uploads/1/3/0/6/130639343/kibigojepigotulu.pdf
    • http://therightofway.org/uploads/1/3/0/5/130588834/6783594.pdf
    • http://mailinbackup1.krby-philippe.sk/uploads/1/3/0/2/130272909/6bc6b7df386.pdf
    • http://catsummitbhm.org/uploads/1/3/0/5/130546519/1945148.pdf
    • http://www.thesuev.com/uploads/1/3/0/2/130289703/poluzapatidiw_vipom_fetaza_febexuxefo.pdf
    • http://windbellows.net/uploads/1/3/0/9/130969076/90af34101d8345.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008571.bin
6ddd712da78796c65657566cefa3ab70604796551c3b677daeba287720c11b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8571 8604 bytes
font_01_sfnt_off0000a60a.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA60A 4144 bytes

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