Malicious PDF — malware analysis report

Static analysis result for SHA-256 34efb59889b89ea7…

MALICIOUS

PDF

42.5 KB Created: 2020-03-28 08:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3bdb89f60d4001aff8f082ee9e404ac1 SHA-1: 16a0c8fa08696ae82b6d56f90bad59ef65d66501 SHA-256: 34efb59889b89ea758270f6a4a0f6d1423e32056f2116f17a681e472cec7f8e6
62 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, indicating a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to direct users to numerous external sites. No scripts were extracted, limiting further analysis of the payload. The document body contains garbled text and references to 'wkhtmltopdf', suggesting it was generated programmatically.

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://exactransreportingsvcsinc.com/uploads/1/3/0/8/130874239/130874239.html#cual+es+constitucion+basica+del+atomo
    • http://www.brancleaningservices.com/uploads/1/3/0/6/130620943/remelulelobino_somomamivu.pdf
    • http://www.jsevilla.net/uploads/1/3/0/9/130969236/d3a52828992cefa.pdf
    • http://kyoto-japan-django.club/uploads/1/3/0/4/130476395/a6992db7a95dec.pdf
    • http://pomoc.piastinstitute.org/uploads/1/3/0/6/130603930/5913799.pdf
    • http://jailz.org/uploads/1/3/0/4/130435583/5479819.pdf
    • http://ravisatyakahn.com/uploads/1/3/0/3/130323092/694158ba0c.pdf
    • http://pilotprojects.net/uploads/1/3/0/6/130620767/b5edded41384ff.pdf
    • http://ballmaniamcr.co.uk/uploads/1/3/0/5/130550956/5723683.pdf
    • http://kellyannscraftcorner.com/uploads/1/3/0/5/130543158/vakigamijoka_pepibososafox_towiraretarupa_zodawisi.pdf
    • http://campuscircle.org/uploads/1/3/0/5/130589045/839951a1f.pdf
    • http://porktexas.com/uploads/1/3/0/6/130639306/6b3bf4cf77c.pdf
    • http://nnpsolutions.com/uploads/1/3/0/9/130969313/bejitu.pdf
    • http://northernkettleswoodshop.com/uploads/1/3/0/6/130639373/kivuv.pdf
    • http://neocaliclay.com/uploads/1/3/0/4/130476821/379326e4089e4d0.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_off00007a56.bin
e2a554ff9e8e0b84f3ecd5391877315ca292f8ac64f78b3384ccbb0a74a92c7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A56 9196 bytes

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