Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac012bf9b73657e8…

MALICIOUS

PDF

38.5 KB Created: 2021-09-06 06:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9bc5db11cf340f04d9694584fb1573a5 SHA-1: fcae8c4c1925f4f3f11ed762d2d8ffbbb05c4918 SHA-256: ac012bf9b73657e8e2520f0632e45d8236e68f8888a824256aeca88b1d66d0b3
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is designed as a phishing lure, using an image-only presentation to obscure clickable links. The embedded URLs predominantly point to compromised WordPress sites and disposable domains, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8477

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 38 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://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607802c2a349d---92944627221.pdf In PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1gf5jbu7au866e8v8e0ud004a7/joguditebufoxi.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/vexagajutadafakelovuxizu.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/a4ad07c5ef23f52ea7474ecb5cfbb057/26171269540.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/50885217751.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/434349f5f87e52b2b8b6d1502d9bc37f/10213730915.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/66044480745.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c6d80d8b76f0b2e7bd32ce70c0a2c2c1/18321975295.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/67485450287.pdfIn PDF document text
    • http://strap.sk/uploads/file/jisoteto.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/47578068280.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202181812122060.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/d2c0In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=historia+de+la+iglesia+catolica+edad+antigua+pdfPDF link annotation

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