Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3507cb68c901ab…

MALICIOUS

PDF

39.0 KB Created: 2021-09-21 19:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 092f7c4da91eaf18d9d18e2dc87b4696 SHA-1: 3adc7d075a6d4d14c1d8fdf348c0e5b559d7bdd2 SHA-256: ea3507cb68c901ab54a9a336df079c9653d304aa7f2f52c742a95f8fd487e946
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF is designed as an image lure, presenting a screenshot to trick users into clicking a link. This link directs to a compromised WordPress site hosting another PDF, which is likely the final payload. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8588

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 http://mascotdd.com/file_media/file_image/file/sepugugopulopakedoli.pdf In PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/h22vq42tcl1fn489e3qqgidqq5/89437619072.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca59b0a51---fuvakituxutojimawovude.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/wizinewinomuw.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/xelunobonasuka.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/34cc7f9fab5eeac5e87c57655cff019e/28242610295.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/86558270438.pdfIn PDF document text
    • https://lemonsport.sk/upload/file/25021876043.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/lalika.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/vonuxomar.pdfIn PDF document text
    • https://svltv.in/userfiles/files/73990577732.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/guwub.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/89929653093.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161354f0449b7c---rerope.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/66c5114a4e39bbae7e1f6238c34b8970/titesunulifawugixiravuxer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=redmi+note+10s+problemsPDF link annotation

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