Malicious PDF — malware analysis report

Static analysis result for SHA-256 627205548d25383f…

MALICIOUS

PDF

51.0 KB Created: 2020-03-24 23:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5adf78285f08011d4755ae2055642e78 SHA-1: 8eab83709b07d430796569a03de45da4573b1fb7 SHA-256: 627205548d25383f2764dbca8892c278279959d64799a1ac8225e25792565fd7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded external links pointing to various domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The primary goal appears to be directing users to a vast network of linked PDFs, potentially for SEO manipulation or to serve as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://naafay.net/uploads/1/3/0/4/130476795/130476795.html#qu%C3%A9+es+la+importancia+de+pertenecer+a+un+grupo+social
    • http://bluesandpearls.com/uploads/1/3/0/4/130476043/milajomisa.pdf
    • http://www.proximalevis.com/uploads/1/3/0/7/130775986/tesusorexelavuxiti.pdf
    • http://choferenmadrid.com/uploads/1/3/0/2/130287977/2478790.pdf
    • http://hippypalooza.com/uploads/1/3/0/7/130776474/gojovusivepuwe-gamovujaxazijop-binufej.pdf
    • http://taylormadewoodcraft.com/uploads/1/3/0/5/130588973/sedukifepis-xakoranikifexi-zexetoxeno.pdf
    • http://www.getluigis.com/uploads/1/3/0/6/130621973/4182e751a939.pdf
    • http://sistereducator.com/uploads/1/3/0/4/130488512/4609664.pdf
    • http://mta164.qualitynow.net/uploads/1/3/0/9/130968921/bf5369e2525fc2.pdf
    • http://hasanhadee.com/uploads/1/3/0/6/130639822/zusisexusizixo.pdf
    • http://custobran.com/uploads/1/3/0/3/130323422/nakosenexire.pdf
    • http://bdagdc.com/uploads/1/3/0/5/130543682/2132583.pdf
    • http://pjscafeteriaandcatering.com/uploads/1/3/0/5/130543366/bilojimudux.pdf
    • http://zenwich.co/uploads/1/3/0/4/130476410/wozajura-bodanosudak.pdf
    • http://www.angelwhiteskinandwellness.com/uploads/1/3/0/4/130476045/dd3a2.pdf
    • http://mta-sts.franklinrodandgun.org/uploads/1/3/0/8/130874165/zogovofap.pdf
    • http://stazkoassociates.com/uploads/1/3/0/5/130551524/8f172f3.pdf
    • http://mpcaa.net/uploads/1/3/0/2/130271096/2055000.pdf
    • http://warriors-hope.org/uploads/1/3/0/4/130489742/jakipogabodup.pdf
    • http://www.bvankruijsdijkarchitectuur.nl/uploads/1/3/0/7/130776314/godafagimidano.pdf
    • http://www.mystealthbikes.com/uploads/1/3/0/2/130271126/2111832.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_off000099e2.bin
95aeaf6013309d3860f340676df1665b2ceb6e4eeda15af4aaa809625292c714
pdf-font-stream PDF embedded font (sfnt) at offset 0x99E2 9356 bytes