Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f5efa5a653d258…

MALICIOUS

PDF

39.3 KB Created: 2020-04-22 05:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 44a55c6f1f67977f2d775ab27a480208 SHA-1: 394d064e57d6f29188318b5b40131da4231b56af SHA-256: c4f5efa5a653d258a6270c118ee888eea10ec70bdf4fe58eb058864827fc12e5
70 Risk Score

Malware Insights

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

The PDF contains numerous embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though garbled, suggests a lure related to 'model business letters book pdf'. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports a social engineering attack. The primary goal appears to be directing the user to external sites, likely for credential harvesting or malware delivery.

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://reshootarchery.com/uploads/1/3/1/1/131163505/131163505.html#model+business+letters+book+pdf
    • http://capobiancositalianspecialties.com/uploads/1/3/1/6/131637125/9673601.pdf
    • http://cageymoon.com/uploads/1/3/0/7/130740512/7f109574.pdf
    • http://jjmyersconstructiongroupllc.com/uploads/1/3/1/4/131406381/545062.pdf
    • http://instructorjb.com/uploads/1/3/1/4/131437423/5658999.pdf
    • http://myartisfashion.com/uploads/1/3/0/2/130289748/vamufikixizolu.pdf
    • http://almineleclerc.com/uploads/1/3/1/4/131406289/fudisolobevo_nusalere_zunogumekasikig_geponixonujolo.pdf
    • http://mansmellysocks.com/uploads/1/3/1/4/131409557/wikojoselotopideve.pdf
    • http://thesofisticatedswine.com/uploads/1/3/0/7/130739074/da3130604f.pdf
    • http://silverbirchescamp.com/uploads/1/3/1/0/131070852/5692763a2b.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_off00007449.bin
cea8af770b1e28e1caff2ee9ab28afb11e4a5eceb1913c2b227fa296967c8a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 7328 bytes

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