Malicious PDF — malware analysis report

Static analysis result for SHA-256 8893dbe409e5031b…

MALICIOUS

PDF

70.9 KB Created: 2021-04-08 14:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a8ef369e48054778e8daeaeff0b840a SHA-1: eeffea644e3476ce39583865f7ba8f133c7e2e57 SHA-256: 8893dbe409e5031b779e9a5628018def23f8a753b903db4e7dbd772433799148
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, one of which points to a domain associated with link farming and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7621

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/pefusoxewirevujilo.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/28911573484.pdf
    • https://www.woonsocketri.org/system/temporary/webform/konoju.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/27880179426.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/7322176875.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/95859103094.pdf
    • https://www.uts.cw/sites/default/files/webform/50818196885.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/bulurifabisiwotubavigivos.pdf
    • https://ambrose.edu/sites/default/files/webform/vopezupudatirarib.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/51762260361.pdf
    • https://www.afscme65.org/system/files/webform/52844377902.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/subeditanutojodojewogize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=antrenmanlarla+geometri+1+%25C3%25A7%25C3%25B6z%25C3%25BCmleri+pdf+indir
    • https://campusrec.princeton.edu/system/files/webform/popikinof.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/31460711967.pdf
    • https://www.vub.be/sites/vub/files/webform/lijulur.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/66140853426.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/5272012193.pdf
    • https://www.healthdata.org/sites/default/files/resumes/jojilekavoxojomoz.pdf
    • https://www.healthdata.org/sites/default/files/resumes/18848190838.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da8b.bin
3631834a0470e09e0b7b8a6d91641817542e844ae82e7b050216313aa12b2df2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8B 5712 bytes
font_01_sfnt_off0000ed72.bin
c025ad1dffd3b3507f3b3c829154bd32387a1a0dbe2cf12b8fb5a1dda9b5e760
pdf-font-stream PDF embedded font (sfnt) at offset 0xED72 13000 bytes