Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab60f333139486d…

MALICIOUS

PDF

79.3 KB Created: 2021-09-04 10:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 85546119673445dec105ff496f25fc0f SHA-1: f8f24b3f2b4336bb494e7d13c2e0ee7a3256bd41 SHA-256: fab60f333139486d56d525e6946f49ebf056a146aef75f96cdbc1eefada6af28
156 Risk Score

Malware Insights

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

The PDF contains a significant number of links pointing to external websites, many of which are hosted on compromised CMS uploads or disposable domains. This behavior is characteristic of a link farm designed to lure users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://goteneplast.se/files/images/file/70485451209.pdf In PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609191f5ede65---kutebuvaruxawuxujo.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/wojizesuvapidezutigu.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/44143792120.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/f81b36c479fb0b0859344aba56c9ae79/nimulidimowurujodirelez.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/14536857994.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/jijiliboripima.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/jebebozolozixizubadilu.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/difunosudipemavisaden.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/97881993570.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/s85qj2nc5f701m95jgm2k8aka8/jaloruvi.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/75525462d8945fe10b8e11778923301c/negivixutonitem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b9b6ee705---84661229627.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f2178d74---1641115272.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/tesuwakuleni.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/b1e5f34070db783718b346f932f23683/2477552490.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc1a2895a8---nibutipirunitugewepox.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/danezudixodiwul.pdfIn PDF document text
    • https://chp-travel.ir/data/file/wafitakudunuxebewo.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/duneratezi.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/redetubazizipepi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f6cd962146f26dc32ad2328a2bc258d0/41455797107.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/tojoxozazonaxivawu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=customary+units+of+measure+worksheets+6th+gradePDF 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_off0000cef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF7 17760 bytes
SHA-256: 87928470f223498be5e48beaf07c89e4be8a8adff992e700dc76d7bcf5118856
font_01_sfnt_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 11344 bytes
SHA-256: 8f853d616850da40baef3534f78d5e76f17b988f4a5865ec5f50d538d9cecb60
font_02_sfnt_off00011745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11745 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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