Malicious PDF — malware analysis report

Static analysis result for SHA-256 a139df555e105998…

MALICIOUS

PDF

40.9 KB Created: 2020-04-22 21:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5e050e4bb6d54c15348805538507ce5f SHA-1: d746577c46c1b31bd8c4ef986bed790f8f24591f SHA-256: a139df555e105998eb793066abd4930443554dff1457ea023cedeb5d73858996
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. One heuristic specifically identifies this as a 'PDF_SEO_LINK_FARM'. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern. The document body contains a reference to 'Flash banner maker free full version' and a URL, indicating a potential attempt to trick users into downloading or visiting a malicious resource.

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://lindenvalleyarena.net/uploads/1/3/0/5/130588956/130588956.html#flash+banner+maker+free++full+version
    • http://fbcosp.org/uploads/1/3/0/6/130603745/dafebado_movasapo.pdf
    • http://sashflora.com/uploads/1/3/0/3/130313363/nexikiz_ruximux.pdf
    • http://tropicalsail.com/uploads/1/3/0/5/130550961/jeminukazijuxes-pizivefita.pdf
    • http://junkmen.net/uploads/1/3/0/5/130588164/7988793.pdf
    • http://southwillowah.com/uploads/1/3/0/5/130551049/787603b8a5d60.pdf
    • http://engagedmarketingpro.com/uploads/1/3/0/4/130488401/531153.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_off00007619.bin
a48b57ed29a5f7261d912d71562682586cfe12ce13954ef7edf2c46f714dd1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7619 8932 bytes

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