Malicious PDF — malware analysis report

Static analysis result for SHA-256 0960d221f79aea4d…

MALICIOUS

PDF

44.8 KB Created: 2021-04-06 20:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e53e93fd8c8c9ab099e4aa06c6877c15 SHA-1: 68a21ed576ec983045b64d9ec70208fc99f7c929 SHA-256: 0960d221f79aea4d984f327e899b57fc8ea578fad685d20e51bd1ac3525c0fc7
144 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot hiding a clickable link. Several heuristics indicate it functions as a link farm on disposable hosting, directing users to various PDF files. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure suggest it's designed to redirect users, potentially to a malicious site or for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 44 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://cicatsalud.com/html/sites/default/files/webform/61943826361.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/25680057182.pdf
    • http://www.friendlycc.com/sites/default/files/webform/98819861428.pdf
    • https://aboss.by/sites/default/files/webform/zivexovoburowunaxomenip.pdf
    • https://www.jsif.org/sites/default/files/webform/rijuluzevowogadabiwi.pdf
    • https://www.mainephilanthropy.org/sites/default/files/kimakevenowafuxopepasu.pdf
    • https://ambrose.edu/sites/default/files/webform/49323480199.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/bugoxugokerudanetisene.pdf
    • https://ambrose.edu/sites/default/files/webform/sudelo.pdf
    • https://ambrose.edu/sites/default/files/webform/padubomi.pdf
    • https://www.jwico.com/sites/default/files/webform/minokoniniwige.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/17184396690.pdf
    • http://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=epidemiologia+analitica+definicion+pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/posilo.pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/janoruzafasolefixos.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/moxogugudufagelo.pdf
    • https://lib.asu.edu/system/files/webform/dilitopuwivane.pdf

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