Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f7ee0960871ca8…

MALICIOUS

PDF

69.6 KB Created: 2021-09-26 17:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 28bbe8d346931ce2bee9405bada3b71e SHA-1: 72c00c5053ad0ba4ebd3ce350294c281ff10b14c SHA-256: b2f7ee0960871ca891f10eec8f05a58c62d831be9fff89bbbaa5948d78ac14cd
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The presence of a 'movie download link' in one URL suggests a lure for potentially malicious content. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://vzwsportenmuziek.com/content_docs/gemunulodalumas.pdf In PDF document text
    • http://metrocars.london/survey/userfiles/files/8870786787.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/19074761908.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210907001043.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613147947749f---28954235661.pdfIn PDF document text
    • https://stotex.rs/files/53802477569.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/96086037495.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021919_21047_647.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/47943743852.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/tefugoburirabisemuse.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/pofidoxivuzonasagilamese.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/loxikomavabevuxarivijos.pdfIn PDF document text
    • https://esz.jp/img/editor/files/valowemokabowugumafa.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/wugubijidepedidimikufi.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/s9r55fb2liagqm6quj22hpaod5/puxaz.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/84031345023.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161329dc8a7af2---19324891254.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/9edc68fd4219575c91371ec74fa61f4a/minopasosuwelumapo.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/tudil.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/96391312800.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/difevirem.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/56739696885.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/jomumam.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/pebitenumozevotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=movie+download+linkPDF 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_off0000b347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB347 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5E 10112 bytes
SHA-256: 9575e28cacaeee7d48e4cbf264fdba47a3fe8ff30fa768e21b7849ca5b93f13c
font_02_sfnt_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 15372 bytes
SHA-256: 985adaa7ad1fee4dab3cf7a7f93dcd4ccffcc416aebe0470b90e2e088f0dff47