Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d12cf4189a17544…

MALICIOUS

PDF

38.9 KB Created: 2021-09-06 00:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 9b2a1eab758dde6f0a414da54acd1954 SHA-1: 57600af68bbe1290dc81ad15219e787463b8f882 SHA-256: 5d12cf4189a1754419ca1d91e0df80686ec1ed0eea528da2b6fe148b764fb72e
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

Heuristics 5

  • 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 https://garglob.ru/uplcv?utm_term=mazda+demio+2008+service+manual PDF link annotation
    • http://aftckwt.com/uploads/file/42855003530.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/femukudimed.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cda42f22d---soxokanutevavi.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fe54488f2---gibadepapikuf.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/jumezerujanatuxan.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e358e8ba0---45785673438.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/napalut.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/57437720493.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b02dcefb5f623dd3844d69fbe3f5b8ac/79310843884.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/buvivuvitiduwex.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/62717430298.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e51b1f454---97693733957.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/bimetin.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/nofurujefifilatuxomewul.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/kimuzerek.pdfIn PDF document text

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