Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1c0dee43eaaf5f…

MALICIOUS

PDF

84.3 KB Created: 2021-09-02 02:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f3fc314d1b0098516555d0a7e1633dda SHA-1: a04a20d60beeb1681e6e85537ee0f1e446d68b7f SHA-256: ca1c0dee43eaaf5fee5d0d9a59094e7df2ba3fefe97e7b165c24c0dd3db4977a
176 Risk Score

Malware Insights

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

This PDF document impersonates a cloud file-sharing service, a common lure for phishing attacks. It contains a link farm pointing to multiple compromised WordPress sites, which in turn host PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0faa6622c---14161357581.pdf In PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/0o5kpo9e3oiucg3n35sg0njoug/78169890578.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/fda62c91b81467854c9671c8f6342af5/natawawefirowalu.pdfIn PDF document text
    • http://beiks.info/public/file/77343429588.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/pawojokakitawer.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/7817682450.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/pijivunuwi.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/83965350592.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/519198c73f84bcff04853fee3ccbbca0/fovuziwovaboveb.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/vodewe.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/kunuriwirutojanoxorel.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/diwozililezupelolojikidi.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/46950183118.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074d63a392c8---duwivek.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1622888566tamelawajanasani.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/9j2fv0med4hv71m3khf24o8crt/95346388856.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/24292921308.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/91685711402.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/gipoladubep.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/kh028k011ho127in39hffoeo5s/borumaponuvixogomolusew.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607479f2eda34---zupaxizenoguxufukuzisat.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/7f696e0c6c6d3a7d5fd3201188054ec7/wiroxejafunifik.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/108189b8f70c67688aba814c5df84d7b/26087575856.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/85652682396.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=onedrive+not+syncingPDF 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_off0000e5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D2 10540 bytes
SHA-256: 212dbe2ff80f7b43a47b8486b1239af29970608bad8d1228432908468adb54a4
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 17540 bytes
SHA-256: 5c65aae4fe2ee403d53642dfc77b63f9313c90332f2fde240e849fe00cf44cd8
font_02_sfnt_off00012b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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