Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c1dcf00c1fc775…

MALICIOUS

PDF

42.4 KB Created: 2020-03-21 19:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c14d5e87b504ca146f9de2eb8be285d1 SHA-1: ea00db9748f1a2fc9850d5e91f0a77cada68dbc4 SHA-256: 88c1dcf00c1fc7756db9a09f767d36b65344cf7aafbe5e67e6fb7d71d5fc97b4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Stage Capabilities: Gather Victim Identity Information T1204 Malicious Link

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a multitude of external PDF files hosted on various domains, likely to achieve a malicious objective through these linked resources.

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://herbinside.biz/uploads/1/3/0/7/130739399/130739399.html#situacion+didactica+sobre+ubicacion+espacial+en+preescolar
    • http://bch-marketing.com/uploads/1/3/0/2/130289475/widoxipegitas_kipemuweset_sejoropepip_losapuved.pdf
    • http://cpanel.realtypartners.madesimplydev.com/uploads/1/3/0/5/130546645/fixakevojisijabap.pdf
    • http://allegianthealththerapy.com/uploads/1/3/0/7/130739238/1014681.pdf
    • http://towtrucklittlerock.com/uploads/1/3/0/7/130775050/volematur.pdf
    • http://popmetals.com/uploads/1/3/0/5/130590122/zovuxigivoviwa_siruguxuse_dimuzutavira.pdf
    • http://www.newimagetreeandgardenservices.com/uploads/1/3/0/4/130483773/d4af62f0844b.pdf
    • http://hostmaster.paragonpipeline.com/uploads/1/3/0/3/130323355/4682947.pdf
    • http://goldenberggroup.ca/uploads/1/3/0/5/130588620/7346195.pdf
    • http://phcvaldostatest.org/uploads/1/3/0/5/130539120/4027242.pdf
    • http://mail.waltshotrodshop.com/uploads/1/3/0/8/130874582/selupejuvof-tuneruba-zabebinopix-tepiko.pdf
    • http://www.sanantoniowoundcare.com/uploads/1/3/0/5/130551967/silasakevoriw.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_off000078de.bin
4bf25e7fa711f242b5c4eda9ea6a7d6c14d33fde595801bde6d64087a3ef92a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DE 9304 bytes

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