Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f13a7047c64dd3b…

MALICIOUS

PDF

91.7 KB Created: 2021-07-26 09:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 071972094abc95b2c21dddf5cf246637 SHA-1: 9948e76750c192df83ab7ff29cd8dafcb2a044be SHA-256: 3f13a7047c64dd3b7a0464c8c1e1c14529daa31505b30cb5cd726f69440388f4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document impersonates a cloud file-sharing service to lure users into downloading a malicious PDF. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ce9fc984de5b7bffb9a91ea3138ef102/sobaxogebabemibuwemebelif.pdf In PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/ceka324n7rkfm3suhkeubj0j04/lijiv.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/movalexevakatuduworekulo.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/zolovazikusaxaraf.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/62218010011.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d34d4d6c264---zuwevokezakanojemafilef.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/66782269310.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/66788060050.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/64767275127.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/54292522603.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f921f912e58---mebikaxapagojanedezejuna.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/nonikujozetiw.pdfIn PDF document text
    • https://mfdesign.hu/files/file/xopuditebana.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b76a87930---bimumovimasilobuv.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/gawizabu.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/modokuvipavikogi.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928f8570b57---futetepoferif.pdfIn PDF document text
    • https://m3csrl.com/file/bowixugo.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/bmeobhg73t4hdqm1j1j11ngvpl/vatobirajibik.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/71319420153.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/xubupibawolamafoxagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=six+of+crows+pdf+google+drive+englishPDF 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_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 16932 bytes
SHA-256: aaa5045b34fedf7184e58e2a3366860ca79cccc76464c794f09b9f383c17b7c4
font_01_sfnt_off00012e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14640 10968 bytes
SHA-256: 8278b5ba86ec87314205ce1283688d0c32202b0dd236dd14c4687a7093643d4b