Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5405ffd69bb41a…

MALICIOUS

PDF

42.3 KB Created: 2021-06-26 15:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 793666c9d5b7d27b1e77f53e0a0d8ea3 SHA-1: 1c079115d99cee93fcdc253f9c3d46d0a59bf9ff SHA-256: aa5405ffd69bb41abaf8eabf9c46139b885be2e3d7d52b4fa70ff48ff40c0ccf
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and 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 0.7092

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 42 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://logistra.fr/ressource/site-image/files/tawivob.pdf In PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860224715f3---72308805136.pdfIn PDF document text
    • http://bociany.sk/media/file/sedilofagirubowazo.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/tvde3hrfrekef3nsik8komoec1/wekel.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/1adacbec520431c08485a7e16016a017/wewupotarutasirepotan.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe3629a896---kikexak.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/41940822275.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/nabik.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/55187638247.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/e2qd2qsk91nt5skji4kjrfqna7/69903071614.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/15377939571.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/37096275587.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc28bd1283---29738585132.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dce19a766---24242819375.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bff06d0bb2f---34233005466.pdfIn PDF document text
    • http://imaginove.eu/data/Files/mataf.pdfIn PDF document text
    • http://djpress.pl/Image/files/71431630931.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/punisarelaxotaludeninaxas.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/80762446448.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/475cb4ab395f2fd835882d0cf8ad613e/nuxezo.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f85c12e63561c3edeb29224c80f1c023/98199232996.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/87424919067.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/zuzabozukezubixovew.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/bilib.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/62069227335.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=do+not+be+yoked+with+unbelieversPDF link annotation

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