Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6caa48d2200e89…

MALICIOUS

PDF

59.2 KB Created: 2020-04-16 13:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ad01a0a7c3d603d27f81773c7f84d9a8 SHA-1: 594cd8030588baa16800660122b4e5ca3f22f8ba SHA-256: fa6caa48d2200e898d0157c15bad7d9d94315698c309a863e26c1557c203aaa3
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains text related to 'Contagion movie questions worksheet answers', likely a lure to encourage users to click the embedded links. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous external links is a common technique for distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://sciencechicks.com/uploads/1/3/1/4/131436972/131436972.html#contagion+movie+questions+worksheet+answers
    • http://voteforandrea.com/uploads/1/3/0/3/130313220/xavuvobozalidurite.pdf
    • http://teaimeprofits.com/uploads/1/3/0/6/130639099/leseruzaf.pdf
    • http://harperhealthofohio.com/uploads/1/3/1/1/131163666/19e8031c.pdf
    • http://fmhproperties.com/uploads/1/3/0/8/130814681/wewuvoniz-lipokorixorit.pdf
    • http://priscillasomchith.com/uploads/1/3/1/4/131452741/8961891.pdf
    • http://lionessprayer.com/uploads/1/3/1/6/131636841/xewopatedevoxuk_raveramebaxexiw_momirezoxapa.pdf
    • http://hiddencomedy.com/uploads/1/3/0/5/130544746/f725e5c6b311b.pdf
    • http://granskogkaninhotell.com/uploads/1/3/0/6/130639781/5846844.pdf
    • http://alexhowarthpt.com/uploads/1/3/0/5/130550953/e6fd19c3c.pdf
    • http://lean4teensllc.com/uploads/1/3/1/3/131398140/4e74f10fae8.pdf
    • http://solutions344valante.com/uploads/1/3/0/5/130539479/wunitepudek_fawon_xedofojon.pdf
    • http://sustainablesalessolutions.ca/uploads/1/3/0/2/130288483/puvezusib.pdf
    • http://privatelabelwaterstore.com/uploads/1/3/0/5/130590392/sudezilunupikol_zojinubuwererim_lubip.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_off0000bee5.bin
8b771754d1120ae0d22f5b120ab0c0aad2081aa76dd04ba84b3bf3ab80c67841		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE5 8812 bytes

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