Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b62aa75a64701bb…

MALICIOUS

PDF

35.1 KB Created: 2020-06-22 02:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b43cdf412e044659017a0c1472020094 SHA-1: f8e9206121c70f6f4c120197c205d3fa02d5a3bd SHA-256: 3b62aa75a64701bbf72a38793ce2510e4455536d9e4b302f46f1d152d2a388fd
92 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, a common tactic for SEO link farms and potentially malicious redirection. The document body text, though partially corrupted, suggests a lure related to 'Pre-referral intervention manual online'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm indicates a high likelihood of malicious intent, possibly to distribute further malware or conduct phishing. 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://wecreatewebsites.org/uploads/1/3/0/7/130776021/130776021.html#pre-referral+intervention+manual+online
    • http://onoffing.com/uploads/1/3/2/7/132740237/wokuneda_fakugibarudima_munidogo_jajifiwafagupuk.pdf
    • http://innarusa.com/uploads/1/3/2/3/132302999/luzuzasiker_kiveju_mudasiwifisej.pdf
    • http://densionuniversitybaa.org/uploads/1/3/0/8/130874104/af2e4c1.pdf
    • http://amazingphrasepublishinggroup.com/uploads/1/3/0/7/130776818/gututexusu.pdf
    • http://patrice-capitant.com/uploads/1/3/0/6/130621460/201719.pdf
    • http://proudpapagear.com/uploads/1/3/1/4/131406547/afe34.pdf
    • http://9f62fcb350.com/uploads/1/3/0/9/130969481/doxezawokez.pdf
    • http://abqcraft.com/uploads/1/3/2/6/132683087/voburojorigix-wizorumowe.pdf
    • http://jlstreetfood.com/uploads/1/3/0/6/130639034/wixujep-lapoti-vizibavukam.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_off00004b93.bin
512b69b2f7f434e74845b6d3cef3f6c5f7c10944f2ff752476a6a737b688aa9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B93 4712 bytes
font_01_sfnt_off00005b7f.bin
cf645eba6358995f55f57df8e0dd636e37f974e55535896431da75eca7b72468		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7F 10892 bytes

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