Malicious PDF — malware analysis report

Static analysis result for SHA-256 6deae3c02f8ae8aa…

MALICIOUS

PDF

83.9 KB Created: 2021-07-13 02:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: be7f99455ab74f4316a85ff064198bab SHA-1: 90be7b069d7a2746c5be3e1e210086d5688affd5 SHA-256: 6deae3c02f8ae8aac742808fe42426ac54a5775009e625d68a4f3e9e73bbbdfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting, likely to distribute phishing content or malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a deliberate attempt to obscure the true destination or purpose of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://synerhu.ru/uplcv?utm_term=50+common+medical+school+interview+questions PDF link annotation
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/4aa4946b1757591ecfc3a29416b91493/29284571870.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/76675354380.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/tapegekuloper.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/daac4fc2993ea57afe80bd4b030bad15/37862219505.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/d5ef98c27f298a5f9939133b13dae85d/jurivugunogozenajibij.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ed4f07abc597dea613293b38e2cae706/19358273921.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/88334809886.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071caacba35e---tipil.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fdaa1b40e---fuwifofemu.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/d0799857ce6633bad1785e934f432903/5417856149.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3db38ded4a---71199935380.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/be51c51aedd72bfec9be899a8b21675c/dojeb.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b83e4648e---vulufir.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/vibeminavozo.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/26067906797.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/48987795642.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/a364b803aa9b736c5ed53d883fbccfb6/zosekudus.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/98522484854.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073c384b1c62---54898229167.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160bba334119ba---damajiwetuju.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210713_045929.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/renukizux.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/nufamosudawiwek.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/xoxulegodowubore.pdfIn PDF document text
    • 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_off0000e420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 16844 bytes
SHA-256: 8b596333dbe600a0fb05069fbc36ea0611b011d3c0be58a92e50dc070ea5afe1
font_01_sfnt_off00011018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11018 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001282f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282F 11192 bytes
SHA-256: 7fe3bdbfa6686c65cf86b05ad8e136ac485503153071ff0d1fd1ee12326b2997

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