Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1a25efae85b981…

MALICIOUS

PDF

83.1 KB Created: 2021-09-06 12:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ad962f34fb8510418c8655a7f4bfc99a SHA-1: 74fed2f17b468bdcc97ff150c60f0a5a11de4932 SHA-256: de1a25efae85b98140eeb99492feb6070b775b6126dc56729655f405fff387cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate a coordinated effort to obscure the true destination and potentially leverage SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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
  • 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 http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d9ece8ea3---ditorelefikegirifizepav.pdf In PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ae50238c0---35683409182.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/lezovepidow.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/fariwujepimidirareduf.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c8980ac6b---83591454038.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737299e9142---lomoniwigobefuxokapek.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfb2a2cd0f---65433780104.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14b413b50a---kupidopeveral.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/kinopiwojuwosatoxataf.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a829d842d---rolozatipugagowatuwol.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/62233880674.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210521155216193.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/e3f416b5adec232d8c03232b95028a52/51427922888.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e3dbc6ee9---tatoputuvuzabixobedazad.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/4iv7v0ia1lq4vvdskgihmjt7i2/nuxagiresavedinuruzepun.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/betujimufalipekokuxixu.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/fuwigerekesuvat.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/91219710931.pdfIn PDF document text
    • http://perrymanreunion.com/clients/f/f8/f8644f0eb9578147d5589f75b8c3e300/File/lisawu.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/330122cb6bd01a2d85e35623ddc92935/xubitogizasilegiratapa.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/98f3b722ddb713e106ba56b05249f8c7/gufifupegajiripa.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081b318b68f8---gosepuzidamit.pdfIn PDF document text
    • http://foto-video.ch/userfiles/files/92092938180.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/bonivalulokivamudetep.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/gekigunuzebuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=bombay+stock+exchange+information+in+pdfPDF 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_off0000dc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 11524 bytes
SHA-256: aca3fb9d676eaaf8dc2f3771c91cc39e017a5f6b60530b8dc5f69a578b731125
font_01_sfnt_off0000f6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E7 18136 bytes
SHA-256: 83fd6ad57d3ab72ef5b4be9301f681da316aa6f99ce9355851165e9e21d62308
font_02_sfnt_off000125e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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