Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d8aa610c3ad75c…

MALICIOUS

PDF

45.0 KB Created: 2020-04-17 21:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 24d933ce09074ea94f9c9d0fe42c7cf0 SHA-1: 89e566b19b868bf7aa2a1aafc6eda1a27ec00b4e SHA-256: 52d8aa610c3ad75ccf6479186432599aaf36b5aa5e98863398e2ef6e3d070e9a
72 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs on similarly compromised domains, indicating a link farm. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a malicious SEO tactic. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into clicking links, likely to download further malicious content or visit malicious sites.

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://kimresine.ca/uploads/1/3/1/3/131378973/131378973.html#classical+sociological+theory+a+reader+pdf
    • http://swellcleaning.com/uploads/1/3/0/7/130776220/belipoleda-ximojesilozufa-sedepenafuvofi.pdf
    • http://pleasantvalleysprings.org/uploads/1/3/0/7/130775704/4595529.pdf
    • http://graysonmichaelbeats.com/uploads/1/3/0/6/130604500/8239397.pdf
    • http://rubanrevival.shop/uploads/1/3/1/4/131438825/8835605.pdf
    • http://linkedinmogul.com/uploads/1/3/0/5/130551187/falizovubaso-mijomelan-gudurezarunu.pdf
    • http://sercantasgin.com/uploads/1/3/1/4/131437941/2991c8bf636.pdf
    • http://akademikreatifindonesia.com/uploads/1/3/1/1/131164020/joterapezavojevasuw.pdf
    • http://gsaconstruction.net/uploads/1/3/0/8/130874473/bajonuwigefizapexog.pdf
    • http://meadorspaintcompany.com/uploads/1/3/1/4/131407035/dujibunitawu.pdf
    • http://jens.cl/uploads/1/3/1/6/131607054/meramula.pdf
    • http://guardianengraving.com/uploads/1/3/0/9/130969684/dipifopo.pdf
    • http://channelreader.com/uploads/1/3/0/5/130538839/potememalub.pdf
    • http://polishedbronzewaxing.com/uploads/1/3/0/2/130270845/3258255.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_off000084ec.bin
a3cb5d9cf4c3950ccec4bd437159035a8664cf6f40fac2c70632c265c13a20bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EC 8724 bytes

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