Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d732b8603a713a…

MALICIOUS

PDF

41.3 KB Created: 2020-03-29 04:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bf80cf33b79f6acc9aeb6015c665a1a1 SHA-1: 4f43181c5ad6f15dceeed0f8e5182d6ac4ef7282 SHA-256: e5d732b8603a713a13ac80dadcf6d43b7c8e0e20311d35a697d067314d0d498a
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious content. The document body, though partially corrupted, includes a URL that appears to be part of this link farm. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://74-123-75-235.mgwnet.com/uploads/1/3/0/8/130813639/130813639.html#en+que+consiste+el+curado+del+concreto
    • http://www.shuyukan.ch/uploads/1/3/0/4/130489465/sisixumobopejuk.pdf
    • http://www.sammenke.org/uploads/1/3/0/5/130588477/5501344.pdf
    • http://destinyvaluebuilders.com/uploads/1/3/0/9/130969510/gubegisaromeg.pdf
    • http://www.sbmconference.org.nz/uploads/1/3/0/4/130489564/domimuzorum.pdf
    • http://learnenglishni.com/uploads/1/3/0/6/130622120/zizogipadofam_koretepakuligi_towaxe.pdf
    • http://twinflamesvigor.com/uploads/1/3/0/7/130776263/99df7a.pdf
    • http://provoce.ca/uploads/1/3/0/7/130738681/mokepokoxenejujimin.pdf
    • http://myrole.legal/uploads/1/3/0/7/130738730/pulurisebupixap-redadelewadofo.pdf
    • http://annarbormuraltours.com/uploads/1/3/0/2/130273761/zedajamamudoxus.pdf
    • http://introtovideo.com/uploads/1/3/0/8/130814285/bisirisu.pdf
    • http://seasidevacations.net/uploads/1/3/0/7/130740461/5325872.pdf
    • http://gestionnama.ca/uploads/1/3/0/4/130436513/luvaj-mojofera-najepulo.pdf
    • http://pitchmovie.net/uploads/1/3/0/5/130588206/tujekidududik-kitodogilisogul-denafibemaf.pdf
    • http://enjoni-cafe.com/uploads/1/3/0/5/130547527/vifufigukib-walituna-baguvadiba.pdf
    • http://mothersmilkisbest.com/uploads/1/3/0/7/130775052/347c7f886d4cdf6.pdf
    • http://crossingapparel.com/uploads/1/3/1/0/131071166/savawakab-gurupafunum-fenuge.pdf
    • http://okota.ch/uploads/1/3/0/2/130270991/nurum_bopakepufo_nunaguzufoteli.pdf
    • http://pooltexrepair.net/uploads/1/3/0/6/130640144/wikise-fobikevov-wunison-nipiribu.pdf
    • http://mobileonegaming.com/uploads/1/3/0/6/130620543/darugojizitadeg_xazojokiseten_rulinutog.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_off000074f9.bin
a6a21169612b7ba7c4e5df01ae33196c7f311f6ae5bd329b2bb5a2d7b83e3a42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F9 9336 bytes

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