Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e91745cb3a6f61d…

MALICIOUS

PDF

41.5 KB Created: 2020-03-27 09:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 903c7e6cd79423eccd266e544b8cad82 SHA-1: efe0a4c10334df012a5bb3bdc83527195ee1b36c SHA-256: 3e91745cb3a6f61d58ba7db7cb75ab2efee50341e9e0fb9bb2dc5afaa352ee08
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The document body contains metadata related to its creation by wkhtmltopdf, but no direct user-facing content that would indicate a specific lure. The primary malicious activity appears to be the distribution of these numerous external links.

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://michaelshusko.com/uploads/1/3/0/2/130288468/130288468.html#tama%C3%B1o+de+las+celulas+vegetales
    • http://raleighlaxfest.net/uploads/1/3/0/9/130969868/jivarola_kanosota_kolom_xutajame.pdf
    • http://www.garagedoor-repair-ontario-ca.com/uploads/1/3/0/6/130605504/bd2d0407707.pdf
    • http://32shadesofgreen.com/uploads/1/3/0/5/130589313/vuzikuzobiwuji.pdf
    • http://kyaramichellephotography.com/uploads/1/3/0/6/130604558/5854394.pdf
    • http://wedgelessform.com/uploads/1/3/0/7/130775203/dikikomosupo-dutavoma.pdf
    • http://reachingheartsretreat.org/uploads/1/3/0/2/130270898/b2d980934c03.pdf
    • http://brasecollection.com.au/uploads/1/3/0/3/130379517/88171702c1d.pdf
    • http://morrisseywellness.com/uploads/1/3/0/5/130588390/05d0e9.pdf
    • http://jarettmcalistermusic.com/uploads/1/3/0/5/130541745/vofofikezexani.pdf
    • http://alphastoneandtile.com/uploads/1/3/0/6/130605115/7778355.pdf
    • http://rstenurebinder.com/uploads/1/3/0/9/130969385/394f23887e2efb.pdf
    • http://www.boyinghouse.co.uk/uploads/1/3/0/6/130639939/e93b2.pdf
    • http://thinkingspot.com.au/uploads/1/3/0/3/130379356/diribawamogif.pdf
    • http://makerfilmfest.com/uploads/1/3/0/7/130776607/3984604.pdf
    • http://parentsforcare.org/uploads/1/3/0/7/130739080/2617232.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_off000076d5.bin
9466a73ade66ff1bb829fdb7e5986b0f846aa649affa00dc5bfa47d7476df895		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D5 8904 bytes

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