Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d833c76571faa4…

MALICIOUS

PDF

39.7 KB Created: 2021-06-22 15:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 627c41af8cfbca16813dc29c73eb08c9 SHA-1: 4753018fd442d1b182913692267e40be9ac82513 SHA-256: b4d833c76571faa47bb552cf06978e3f20e175139606fdd341c7f511eeb8663a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of an image-only document designed to obscure clickable links. The numerous external URIs point to compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8596

Heuristics 6

  • 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 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://anmoul.com/userfiles/file/ribixejusegeg.pdf In PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/8e8f20d604918a84e17dc81a175b3034/vivekolarog.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073f2e6e92fc---79118878667.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3e4618005---moniromazijaga.pdfIn PDF document text
    • https://soechi.net/userfiles/file/naratadusezulerelebiri.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/67962089639.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3010bc533---32847124955.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/gositakot.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b490349d6cc7944c6b502d2671391def/22088476575.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/57763256886.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083116157790---82068859803.pdfIn PDF document text
    • https://ancoraeducacion.com/images/wutedagediz.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/turepagazuga.pdfIn PDF document text
    • http://china-miyaco.com/img/file/20216209549.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b3f81f348---pukuborula.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/39680135134.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c943dd7eef8---gekojadevimugu.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/51728307330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=stella+the+angry+birds+moviePDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.