Malicious PDF — malware analysis report

Static analysis result for SHA-256 df176ff71b680094…

MALICIOUS

PDF

81.9 KB Created: 2021-09-05 02:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7ca68dbb855803d319c64f9ed92ceaf2 SHA-1: 538884b4c2f0cf953b8e3a47f1ee296e500f2bbc SHA-256: df176ff71b68009491a57acbfe1f631f98f2b003d4d11561573469d3d21c366d
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable domains, suggesting an attempt to distribute malicious files. The presence of embedded JavaScript, flagged by heuristics, indicates the potential for further malicious actions, such as downloading and executing additional payloads. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://247christianity.org/fckeditor/userfiles/file/vedaxazefalodomofedarenu1628629410.pdf In PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/xibewilexawo.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/969103888.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/98e10f734cb764a97453b0191325b531/zulidavazusube.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160738af50dbf6---31266216738.pdfIn PDF document text
    • http://africareview.in/userfiles/file/pigikelepodimodeb.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/19682870222.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c686f704bc8---xuxetur.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/43qgin6fn4r394tk71078lv934/pepuxur.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/47537669929.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a338a913e7b---kidufasizatalotana.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/vimerul.pdfIn PDF document text
    • https://eurotig.ro/file/12230317484.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/13004828055.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/c7c764a90a8f53c090702c0ce0aee10b/52567013375.pdfIn PDF document text
    • http://brainerdhs71.com/clients/0/08/084bd9d902c6a1e3ee48703551c87841/File/10665608290.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/299ecd889615bb8c5c91cdb47a2bb358/rupuwakisuxesipu.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/gadutogepudesofosukatu.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/sakisatarud.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c2f64e44a---16106820770.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8a5c8fbd0d1b83d4140b0b91df40b6cf/bipuvufaperapaf.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/859c483ee39f7bb39cd2337a5c76196d/xabon.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/nofuluvatakideribijuvuvo.pdfIn PDF document text
    • https://isosklo.cz./uploads/suwodenida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=fuji+camera+manual+zoomPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA3 16948 bytes
SHA-256: 12424f4f91e90f56f086fd064ffddd22ccde5ce85bcc2d932652460b851253cd
font_01_sfnt_off00010a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A66 10392 bytes
SHA-256: 9915d368ca0de297b3b7035294db9086602de59450aaa6b55a71b1f547c63e12
font_02_sfnt_off000121d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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