Malicious PDF — malware analysis report

Static analysis result for SHA-256 6225846ff70c5aed…

MALICIOUS

PDF

67.0 KB Created: 2021-09-17 16:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8652dfdc12f03ea8e9362ba65bd450d1 SHA-1: f8beea4a6c77c8975243ef7ace19f38a7278046d SHA-256: 6225846ff70c5aedbaceb83a0c59d105efe96b2b8d3475f2a08c8e3d1dad6279
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites and other domains, suggesting an attempt to distribute malicious content. The heuristic firings indicate that the PDF itself is designed to present external links, likely to trick users into downloading further malicious payloads. No scripts were extracted from this sample, but the structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6738

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://jr-bang.com/uploadfiles/20210903061320.pdf In PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/oegfs1mr4v662h31v7pn1u0k7f/44104266550.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/fusomovezenawilavedonit.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/duxaxiradumatanawizim.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/gopilejawesatojusipam.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136623fe6af1---jemurefulanufibizixijos.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/newevulede.pdfIn PDF document text
    • http://hangquangauto.com/files/gumumozeralowatuxifevom.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/57861088195.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/69614915621.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/ganafezumejimutupufuj.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/felarumedunek.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/fuzulutirimotawar.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/juzalotapurazetezifuvej.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jinoloritaw.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/kovomanafek.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/tukiso.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/vezadibatina.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/70897440322.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/51048291138.pdfIn PDF document text
    • http://njboyuanchem.com/upload/files/nibirijawufafigubawan.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613813a5a312c---rogawazi.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/48640600764.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/24353993336.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/diwugisuromofobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=watch+full+season+onlinePDF link annotation
    • 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_off0000f7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1