Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f599994945fb582…

MALICIOUS

PDF

64.0 KB Created: 2021-04-17 23:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8326e9a7bd4f93566d55cc7bc8739228 SHA-1: 7d4b45b81df7d9d8b083560dcd180a69f4d562f1 SHA-256: 8f599994945fb58274a19695114a4da2e0a082a26a30d72c59c721f291fd0a2d
124 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 seemingly unrelated domains and are structured to appear as document downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8267

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 https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/bariwogutal.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/buvonajevomowetizebijix.pdf
    • http://russian-ice-spb.ru/sites/default/files/webform/files/40307308503.pdf
    • https://www.dgs-interparts.be/sites/default/files/42042694998.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/tajiwugebewozebukak.pdf
    • https://ambrose.edu/sites/default/files/webform/48232920683.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/bugoxugokerudanetisene.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/42535902170.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/powevalixerofewum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+manifest+miracles+in+your+life
    • https://www.vub.be/sites/vub/files/webform/siwujomizawafoxewop.pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/86402477901.pdf
    • https://campusrec.princeton.edu/system/files/webform/4552140304.pdf
    • https://www.vub.be/sites/vub/files/webform/pagilavamuvawasaxega.pdf
    • https://printandmail.princeton.edu/system/files/webform/zupedofijemurak.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e835.bin
c6a1b61d492e7c1f827273066a3e14dada645623a90799bf093c3bfb2c3abc68
pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 5180 bytes
font_01_sfnt_off0000f9ca.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 1800 bytes