Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da76338da8d1873…

MALICIOUS

PDF

70.8 KB Created: 2021-04-15 02:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77f513992075dc00dbc6cbec427d340f SHA-1: 4f4aa05814ff0218f3dc7e8773566ad55ec4345f SHA-256: 9da76338da8d1873d891884b87a0d6e74e558586cdd9bab9dc44c9147b8a55c8
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that, while marked as benign, points to a URL that is also present in the list of suspicious URLs. The document body, though heavily obfuscated, suggests a lure related to 'sexually allowed in a christian marriage', which is a common tactic for phishing or scamming. No scripts were extracted, but the presence of multiple suspicious URLs indicates a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 https://www.a1touchsolution.nl/sites/default/files/xofarazenufokedakuzos.pdf
    • https://www.blplegal.com/sites/default/files/webform/54305505708.pdf
    • https://www.newburghgroup.com/sites/default/files/webform/resumes/talazeleravu.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/32041770382.pdf
    • http://spotlight-sites.com/sites/default/files/webform/44923699615.pdf
    • http://spotlight-sites.com/sites/default/files/webform/sizewavajifur.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/povufukawonafano.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/41266633523.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/14219433733.pdf
    • https://www.jts.org.jo/sites/default/files/webform/76938035167.pdf
    • https://www.dgs-interparts.be/sites/default/files/64751185730.pdf
    • http://www.pacificsportfraservalley.com/sites/default/files/webform/newusagolepilukakatukus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+allowed+sexually+in+a+christian+marriage
    • https://printandmail.princeton.edu/system/files/webform/zixulupuritijidegebi.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/sukazejaso.pdf
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/10713621665.pdf
    • https://campusrec.princeton.edu/system/files/webform/rilawadabovoxilezevateg.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6dd.bin
344389e6d0d146d3ad5c78a10b3b73eb68112153bb1cb91d603599e6600311a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DD 5628 bytes
font_01_sfnt_off0000e9f4.bin
1a3ce9e6ee0026037a359b3babf243084dabd0db3c32ab624c84dad6331107ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F4 10144 bytes