Malicious PDF — malware analysis report

Static analysis result for SHA-256 4131192d21484c62…

MALICIOUS

PDF

75.8 KB Created: 2020-04-29 02:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 860f40033d3b6ba45c1b63e6203b3b21 SHA-1: ff20f92d06a594a3425b2261691fe28294fa9c56 SHA-256: 4131192d21484c62c0e00d369aecc787247af7b5cde55f8e98226de1e0a941c4
70 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 User Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The document body also contains a link to 'wordsmith-sg.com'. This suggests a link farm or SEO manipulation tactic, where the primary goal is to drive traffic to these external resources, which may host malicious content or phishing pages. No scripts were extracted, limiting the ability to determine further payload delivery or execution mechanisms.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wordsmith-sg.com/uploads/1/3/1/6/131606101/131606101.html#bibliography+mla+format+generator
    • http://truebaggage.com/uploads/1/3/1/4/131452823/kaduvitu.pdf
    • http://oliartesa.com/uploads/1/3/1/3/131378916/8604922.pdf
    • http://maykue.com/uploads/1/3/0/5/130539108/4625984.pdf
    • http://happypandamassage.com/uploads/1/3/0/3/130313539/fatadixazipopumed.pdf
    • http://alltausi.com/uploads/1/3/1/1/131163723/xezepev-kofinivu-jokitunatunu.pdf
    • http://marriottediting.com/uploads/1/3/0/7/130740356/593f3c7c163c.pdf
    • http://composltesone.com/uploads/1/3/0/6/130639201/ratosuvibavenu.pdf
    • http://backgraph.com/uploads/1/3/1/4/131437069/8823169.pdf
    • http://logchurchnewhaven.com/uploads/1/3/0/7/130776817/c7a6b.pdf
    • http://cjwoodworkdesigns.com/uploads/1/3/1/1/131164294/mefiw_kujumopireni_femojumujoti_zimagulu.pdf
    • http://peepfit.com/uploads/1/3/1/6/131606815/9089008.pdf
    • http://solarengineeringplus.com/uploads/1/3/1/3/131398575/nikagajakal-rupad-zubibivob.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_off000101b3.bin
494c33b345acab9d0bcc66dc323f3cda90e7ac220ee491180cb768b39d944233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 8740 bytes

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