Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f171b5b529a967…

MALICIOUS

PDF

43.4 KB Created: 2020-03-23 12:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5185660af3489f507d55d15aca8f9c2d SHA-1: d4340a1d90c0c83f1de315cbd9acb48e54747214 SHA-256: 23f171b5b529a9676b160a3406266172e460a80c1ac248555726a7cfaf6fc46f
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This behavior is indicative of a link farm or SEO spam campaign, designed to manipulate search engine rankings or direct users to potentially malicious content. The document body, though partially corrupted, suggests an attempt to disguise the malicious intent by appearing as an educational exercise.

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://dylanwyke.com/uploads/1/3/0/5/130589348/130589348.html#separable+phrasal+verbs+exercise+pdf
    • http://www.pineappleruths.com/uploads/1/3/0/6/130603975/zulol.pdf
    • http://programsformindfulliving.com/uploads/1/3/0/6/130605380/7494588.pdf
    • http://lucaefede.it/uploads/1/3/0/5/130541641/b315974b.pdf
    • http://www.emmareavesphotography.com/uploads/1/3/0/7/130740166/0f260ea.pdf
    • http://sngprinting.com/uploads/1/3/0/5/130543511/latovesan.pdf
    • http://www.arcadesalvacioncarpinteria.com/uploads/1/3/0/3/130323178/zexosibepapo-dafudavuw-sumezuneze.pdf
    • http://kelliecookyoga.com/uploads/1/3/0/3/130379389/4470154.pdf
    • http://riverrosie.com/uploads/1/3/0/6/130621969/topejufiba.pdf
    • http://foothills4x4.com/uploads/1/3/0/6/130604114/4618836.pdf
    • http://www.animal-sos.org/uploads/1/3/0/8/130813750/7cf317e74f6f0d.pdf
    • http://comissionedchiropractic.info/uploads/1/3/1/0/131070567/dudofowi_pexenopesi_pavovafex_gujozajid.pdf
    • http://jjewelsstudio.com/uploads/1/3/1/0/131070530/getuvogo.pdf
    • http://hostmaster.dementiapositive.co.uk/uploads/1/3/0/7/130740221/e7b96540335.pdf
    • http://acementors.org/uploads/1/3/0/6/130620892/xesezubedobij.pdf
    • http://www.thepokeytruck.com/uploads/1/3/0/8/130813307/kaxanekipi.pdf
    • http://thehotelgroupllc.com/uploads/1/3/0/7/130776272/8979748.pdf
    • http://disarmingdoomsday.com/uploads/1/3/0/3/130323103/dugamapifiwenu.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_off00008153.bin
b4b1f175f2a263abd126d7e916abd1227ff7186a522c6283417d1b706a9c4855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8153 7912 bytes

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