Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d226deee6fbe35b…

MALICIOUS

PDF

52.6 KB Created: 2020-04-20 12:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: af72b23cc338011244fc9eb60c81a78d SHA-1: 07196b69eac48f1dc67ad0f6227166ca99fa966f SHA-256: 9d226deee6fbe35bdbb5723314d49b0342ad476371ea29b14ce9eedb24f07c84
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, indicating a link farm strategy. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to external URLs, likely for SEO spam or to host further malicious content. No scripts were extracted, limiting the analysis of direct payload delivery.

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://robth3build3r.com/uploads/1/3/0/6/130639393/130639393.html#pathfinder+sorcerer+feats+guide
    • http://workintel.net/uploads/1/3/0/6/130603810/nizovi_tesazerukukabi_givulalegafuje.pdf
    • http://fortlinen.com/uploads/1/3/0/4/130478174/5787141.pdf
    • http://animatedhobbies.com/uploads/1/3/1/0/131070202/wamoniriboxezowutegi.pdf
    • http://www.classicpugspups.com/uploads/1/3/0/2/130288444/f39958.pdf
    • http://newmarketprocessservers.com/uploads/1/3/1/4/131409508/225528.pdf
    • http://bearcreekorganicsspa.com/uploads/1/3/0/5/130543207/xagixatagu-rolagiv-voboneme.pdf
    • http://angelahoffmann.com/uploads/1/3/0/5/130550755/wamad.pdf
    • http://ogdesigngroup.com/uploads/1/3/1/6/131607777/vakaz_tazoza.pdf
    • http://bodygonutrition.com/uploads/1/3/1/6/131607575/rusalerilano.pdf
    • http://thereccenterweekly.com/uploads/1/3/0/5/130551021/9720281.pdf
    • http://chawahealthcare.com/uploads/1/3/0/7/130776132/muxewuwotujukog.pdf
    • http://sheartrendz.net/uploads/1/3/1/3/131380511/koziwag.pdf
    • http://mascuchfamily.com/uploads/1/3/1/4/131408169/mepojano-nebamiweroko-vojosox.pdf
    • http://keeprimcountrygreen.com/uploads/1/3/0/5/130540609/425487.pdf
    • http://matchacao.com/uploads/1/3/1/4/131452732/fekulonosepuwi_bajejidem_tegotavedivarog_jivikedupit.pdf
    • http://chawahealthcare.com/uploads/1/3/0/7/130776132/muxewuwotu
    • 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_off00008ce6.bin
47d679760f1dc81002e193f55fd596aac29f3e3f8237e17eaccbf29f63eaab40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE6 8796 bytes
font_01_sfnt_off0000ae89.bin
b195ba776360337e0c8847a1f70ebf7e776628c0b6b62df72d82cae76b96cbf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE89 16248 bytes

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