Malicious PDF — malware analysis report

Static analysis result for SHA-256 75def42f07a01a6c…

MALICIOUS

PDF

89.0 KB Created: 2021-07-13 11:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 6cf02608c342458991bdff7d2d853f12 SHA-1: f39a6dd85b0772a18f01957af60d6cf59ef24b85 SHA-256: 75def42f07a01a6c688fc58f7857ad4e14313f021b0ea05efe9926b805c67901
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946eff67295---66167340264.pdf In PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078147b6995e---29452750882.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/lozukefomuxakonutilixifu.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084062c8377e---dolebemuzakuvixixodozagom.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/12688306617.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210612_070216.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4131a3346---27103722.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/c47a25d0e368f2b47d252cb4b16136b6/malowofezepavogowa.pdfIn PDF document text
    • https://avela.md/userfiles/file/tikunopazosekemav.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/79bafdcd48adcfaf39d5bfb1c751daf3/79862686694.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/cbbfe2a2582739eecb3dffdc112c7851/fukolo.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/nowetomidofagamenapebar.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/225574c3b59ef32426f3de46c9313179/23635752217.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/e4578611b279bab7c88e5cf1a0817a6a/savugazinefi.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b672a29d2---wogemafofazijonofos.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/52414228909.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdcb0ee46f---zavexumejuvirojonurisexaj.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3f3fe1925---gumitafosetebogabumaze.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/wukupesiwaravavo.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/satuxifi.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/mifuvududopenefivizus.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/762tsr5a9ulpj70gdpjn3pjts7/nupufisu.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/ed599bd16c9de89e3d6e2bfa5645649f/73046691242.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2183a4c70---45786657754.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f6eb52980---52508157869.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=ghetto+gaggers+black+history+month+week+2PDF 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_off0000f57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57F 11268 bytes
SHA-256: 06db48e776178678998029c7449cdf27973ea5a491cd20b69b93f3cedbdf2d85
font_01_sfnt_off00010ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF4 17100 bytes
SHA-256: 338afdf069f9036c1a973adfa49a4f852b7375348f4d94f6606161f5e6913733
font_02_sfnt_off00013cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1