Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d569275a22c450…

MALICIOUS

PDF

70.0 KB Created: 2021-04-07 05:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce709d8b170276bc2461907d57e03375 SHA-1: 91406f4ad62145abfba57dde82a1b01a038c45e3 SHA-256: 68d569275a22c4501cae4e77778035045a11b00bc4dbab271e09c87387bf504c
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lead users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9684

Heuristics 3

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://www.ofalloncasting.com/sites/default/files/webform/wibojamivumararevede.pdf
    • https://www.blplegal.com/sites/default/files/webform/8025899801.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/73261430544.pdf
    • https://aboss.by/sites/default/files/webform/76513539396.pdf
    • https://www.jsif.org/sites/default/files/webform/95147346690.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/dutaberapowuniz.pdf
    • https://www.jts.org.jo/sites/default/files/webform/1653940235.pdf
    • https://www.uts.cw/sites/default/files/webform/tidenopuzi.pdf
    • https://www.uts.cw/sites/default/files/webform/suvexaxobufakup.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/99469138220.pdf
    • https://aboss.by/sites/default/files/webform/vobefoxejajizagosoberob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=signos+y+sintomas+de+angina+inestable+pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/60395266702.pdf
    • https://lib.asu.edu/system/files/webform/bejugejotofetuxiw.pdf
    • https://www.vub.be/sites/vub/files/webform/piwolumubixu.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/zuwamusijugowop.pdf
    • https://umatter.princeton.edu/system/files/webform/requests/tutoturabawukaxubudevodor.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f15d.bin
10a0e06bbdef92a7433ee21e3a16656c9fe72ed412b909b956c12b5b2acd181d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF15D 5612 bytes

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