Malicious PDF — malware analysis report

Static analysis result for SHA-256 8213e88d11572979…

MALICIOUS

PDF

63.7 KB Created: 2021-04-22 08:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 549d18cfb8a61200fc429a6f31ae4e15 SHA-1: e97323d1179df3541097ff9b9c6c6cff674c03ff SHA-256: 8213e88d11572979a1f4780a80dfc2a1be941337c34acddec0eb95e64d76e3f3
124 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to seemingly legitimate domains but are likely used to obscure the true malicious destination. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9695

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/12812059159.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/17654710786.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/taxevoxasubosiwugudabi.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/65810703597.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/zizepuniket.pdf
    • http://www.friendlycc.com/sites/default/files/webform/98819861428.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/47147916176.pdf
    • https://natsihwa.org.au/sites/default/files/webform/degajakuko.pdf
    • https://www.woonsocketri.org/system/temporary/webform/konoju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=scientific+method+lesson+for+middle+school
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/ruwitik.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/5272012193.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/moxogugudufagelo.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/fapivo.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d3.bin
0e40851512eaee52644455bee15bdc6c96e6d552fec1c52c455494d633bb9ffd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D3 5156 bytes

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