Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e164ae8f43ff364…

MALICIOUS

PDF

40.3 KB Created: 2020-06-10 14:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad188f31062a2ffe93a977f76b91b3af SHA-1: 55a67933d113ac5d95aac940c794eed3aec116a9 SHA-256: 2e164ae8f43ff364155cda7901d5f191c2cabdcbcfe35c731267bf3246a833fd
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to similarly structured URLs on different domains, indicating a link farm or redirection scheme. The primary heuristic identified this as a 'PDF_SEO_LINK_FARM' and noted a mass of external PDF links. The document body contains garbled text and a few URLs, reinforcing the link farm observation. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://nolimitz.net/uploads/1/3/1/6/131606241/131606241.html#mataste+mi+amor+teodoro+reyes+youtub
    • http://a1accommodations.org/uploads/1/3/1/3/131383546/jivikenazubos_wanowufex_malugirujubuke_gejifibig.pdf
    • http://luisruuska.com/uploads/1/3/1/6/131606651/nufodetesafojajex.pdf
    • http://lynnvogel.com/uploads/1/3/0/3/130324416/2936467.pdf
    • http://bhavaliapromotions.com/uploads/1/3/1/3/131379866/mubufav_vasegowogas_fukinunobew.pdf
    • http://katelynblomquist.com/uploads/1/3/0/9/130969144/6451399.pdf
    • http://jinyuguojiyulecheng.br3h.com/uploads/1/3/0/6/130639192/06ee82c47b8f08.pdf
    • http://gritcardioclub.com/uploads/1/3/1/6/131636575/119419.pdf
    • http://michellejoneshealing.com/uploads/1/3/2/3/132302924/kasunavajoxipu_jekixagawad_zelojotoboxuxu_jalipedagudiwa.pdf
    • http://ucarha.org/uploads/1/3/0/5/130543272/c9f82e73d25e.pdf
    • http://massage-gamlitz.com/uploads/1/3/1/3/131398489/simomewukabaxigon.pdf
    • http://kishkoinc.net/uploads/1/3/0/5/130588511/0402911f416.pdf
    • http://host42.carmichaelnl.com/uploads/1/3/0/7/130739039/nadigovawekudak-lujimevaw.pdf
    • https://fakenigali.files.wordpress.com/2020/06/nerevujis.pdf
    • https://nifizozege.files.wordpress.com/2020/06/56133957398.pdf
    • https://tudekasimur.files.wordpress.com/2020/06/wixuxi.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_off0000589e.bin
53511a0c7a04d7b93ed42931137f5874deac847bd62cbb2f7ad745e7e576aca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589E 12100 bytes
font_01_sfnt_off00007f5d.bin
149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5D 16036 bytes

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