Malicious PDF — malware analysis report

Static analysis result for SHA-256 69643b045691af12…

MALICIOUS

PDF

101.1 KB Created: 2021-07-04 05:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7313d5ba1c591aed42949234a771e7c8 SHA-1: d8cbd3f36b13092150645b51d056d57c60f904f4 SHA-256: 69643b045691af12ac3f80e9b93155d79afbd5b83c6bc7f1b7389dff1de26dd3
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 compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is unreadable, but the heuristic firings clearly show the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1d8be515b---83726232193.pdf In PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/3f7a82f83fea5ae4eb45d4fd625e23cb/60454357346.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/bapekogenijovug.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/20779502727.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/3445b99e25b931de633833e56400f4c6/lubimiguduzut.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/161401eef8cccc58a0b580cd3c9f42c3/91580008375.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/vuxufatisi.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/b373d1ac206bc911e951ead23aa2b012/nebeboreligumaxiwubowo.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b4847e47b15e1050e3c5b39b6f62800c/20859667831.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/nijego.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/67979399556.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080ceaae5ffd---lagalukofopuxupuf.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/figujuvirinikis.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/lezirufisafifozokerar.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/rulutukisef.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-13/20210513213613589342.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/60685136598.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5ba65d8e0---10137070508.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/0cb29a300e4338c6a982925164437cd3/xumov.pdfIn PDF document text
    • http://kelvista.lt/images/files/joguwisigijekak.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3fd5782982---50239491719.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/9708456687.pdfIn PDF document text
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/2661112261.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fe85ee9f0---78085698247.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a68cb925c2d---wepajeledora.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/xevowijaxaluweximebiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=gesell+drawing+test+pdfPDF 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_off0001241e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241E 10680 bytes
SHA-256: 7ac0bf00d7031ae5b09f555cd37ee1a95f04151db0cac7ed61b62f3ecafe2eae
font_01_sfnt_off00013c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000154a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A4 19900 bytes
SHA-256: 69ef576bc071f57a4f64aa2ae4b3dd7cc88ecf6564c08f3a5466a2d981e39269

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