Malicious PDF — malware analysis report

Static analysis result for SHA-256 c054cdbbede2d7f4…

MALICIOUS

PDF

59.7 KB Created: 2021-09-06 22:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: e1cc14378873a7f8b9e28ff233df6c8a SHA-1: 99c3ecb03f4a6ae694bf7f7e7d391d291d994b1f SHA-256: c054cdbbede2d7f43b8de60cc0e4277962ea7159e5e7621faae7ea4b0d6096e8
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8130

Heuristics 4

  • 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://medvor.ru/uplcv?utm_term=hueber+deutsch+b1+buch+pdf PDF link annotation
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/faxokerixinibedadareruzuj.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc04fcc7b0---75484284045.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/88996393634.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/c5aaef67e3f2b63290f86421538ae4b1/32943654038.pdfIn PDF document text
    • https://empresa-venta.hr/files/92650344038.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c225a68393a---lidoruwololeworejosavare.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/13460972900.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///vemivugid.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/66577385066.pdfIn PDF document text
    • http://bjallstar.com/upload/file/sebazaja.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/gerolel.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/xobefaxivon.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/v0fqd9ijm2gbvh8sb97igngght/bariw.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/4313979510.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090f576e3f30---42211801576.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a439ba757---nubawexofiwud.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/94658526635.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/oug4sgra8bh5d8utaonh279b2j/2243459006.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/wigefejinanuvesikajibab.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090747cc75dc---48495850868.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/9398319956.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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