Malicious PDF — malware analysis report

Static analysis result for SHA-256 5962a8b5cff17abc…

MALICIOUS

PDF

86.0 KB Created: 2021-07-03 11:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 566501e5ab0c15d1c99ff1a4c573dbca SHA-1: 3c1fff2c6e2bd33b50a01cd1277984e827d18824 SHA-256: 5962a8b5cff17abc9566ee4bf90284528f181ae443ad93be4a305a5b483734c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as a distribution mechanism for further malicious content, potentially exploiting users through deceptive content or by downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b08ee34ac---rumipax.pdf In PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/338v81i2v3gpf9t5dadddh4ao2/gunedesazemapab.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/33091552315.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/85677963873.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/kt23t79rpkn2h1q8nne2fvs2dt/rikegadatani.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/0da0b398ac1227635462a9b290167ac9/toxigu.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b233ab87d89---lenudiginusowezir.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/vapas.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e40b02d106---70252296015.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c483de79840---muxapogefekagenojava.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078091a418ff---pulidu.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f2297df0d---dorural.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b983044f52---votedezozukomen.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/u2r6qmeuder5b5gtnbf1rouk63/52303654476.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/36628949888.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddad016df54---wamurilajizogilorenoxerux.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/94161563128.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/10818685200.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/16a666f072224cf940d95a63d49cb86e/62840340775.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/789bb98874f633fab127bdce72023c52/luzojeg.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/cf30837a2c35f1b04c9b25d4231a6ddb/7300835261.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/vomikokamatelat.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/b01getposs9etij1u4bjlm5knb/diwelinojepukurixuk.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/5555268841.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/84565806713.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7504dc824---mitopamiwuxisob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=medicaid+special+needs+childPDF 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_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001072f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072F 10284 bytes
SHA-256: 032e643fff749b8117455a77a42aa4e952641e271d27d2dde0a553f5b7ab8ddb
font_02_sfnt_off00011e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E28 17176 bytes
SHA-256: 520e68c07c6d3199bb7b85b19940b0f5c4ad6a7f294cd4aaf01148956011a9ba

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