Malicious PDF — malware analysis report

Static analysis result for SHA-256 beed08d210e01b5d…

MALICIOUS

PDF

80.2 KB Created: 2021-09-07 03:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2d81f12dafb2c20b9702df0b2322795a SHA-1: b7eaee97690ed0a6629d781579077f3c3ec20a2c SHA-256: beed08d210e01b5d72be235a690263550bff7ea51c8ca32c56ec6f7dc51afd17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The structure suggests a link farm designed to obscure the ultimate destination and evade basic detection.

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 https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607235c2b9c36---javuzuwininuzorife.pdf In PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/lokoxidom.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/161239ccf84a44---21137114227.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/31872875587.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/nilokoposanidaveve.pdfIn PDF document text
    • https://digireg.ch/upload/toxoli.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/dasoz.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lje771f15phucaa54ksvuqj8e2/46029691527.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/68ff0994610f1172f540d2ff8e7bdda3/murumizu.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a040c25208---30827779223.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/jusanorifesabirirawar.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/qlgvc40d4kvp8dss3nu3mq98uo/86839696584.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ff30e6b04---nezif.pdfIn PDF document text
    • http://ridendo.cz/files/file/pobiz.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/geboduto.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/74085837258.pdfIn PDF document text
    • https://digireg.es/upload/fiwaweliduponividaziwi.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/e2dc37835c1ec0a4f079364993828dba/64859359895.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/72b08c5e84b4510d6fc7d1b3f444be72/8672541131.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/37121766364.pdfIn PDF document text
    • http://shs67classreunion.com/clients/b/bf/bf9552935413f2527bbee995f2dfc9b5/File/85269382960.pdfIn PDF document text
    • http://suvenirzp.com/uploads/files/95610246576.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/32283736322.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162268445763800672032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=jatoi+eye+book+pdf+downloadPDF 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_off0000d507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD507 10644 bytes
SHA-256: abc5079b70f6b89dfbccd8bb785b5c4f41ac1aeea55ecd9fb2913a287dd5f77f
font_01_sfnt_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 17620 bytes
SHA-256: 6c51f1a7ac6de4d306730eabc5006998b4d9b3cec7f07bbbafe420b02b6baf35
font_02_sfnt_off00011afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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