Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab4c2829c0ea864…

MALICIOUS

PDF

77.5 KB Created: 2021-09-27 21:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0929e2bfbc23f91da247dd7875e4b973 SHA-1: ea5b7d8c7836896b3c27c03cbd8f12d3c83c94db SHA-256: cab4c2829c0ea8647bc87e68471daf63881eecf9f4045eed9c69ae82f372ee38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting sites, with one URL specifically mentioning 'download hill climb racing 2 mod money', suggesting a lure for users seeking game cheats or mods. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to redirect users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://oniceh.ru/uplcv?utm_term=download+hill+climb+racing+2+mod+money PDF link annotation
    • http://gernano.eu/gfx/userfiles/files/gotinidapej.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f5fdb436c---69163436618.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318a1e2030e---karujozoxolure.pdfIn PDF document text
    • https://shturnev.com/files/foFKED/file/17627388810.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/83962153595.pdfIn PDF document text
    • http://www.memoriahistoricamalaga.org/ckfinder/userfiles/files/jimalixu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130ac71683cf---jefazepanaje.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///54211504715.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/vobufurefegupatimeferi.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/vimijuloxupakafoxafev.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/27208716178.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/44054284941.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/89798784773.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210917_D07F70E684D7916A.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/sowaluj.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/kositurufoxefedi.pdfIn PDF document text
    • http://gewald.ru/content/Files/riguturu.pdfIn PDF document text
    • http://hadt.vn/upload/files/romipojitulawibutilosodu.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/gezonixusej.pdfIn PDF document text
    • http://zae.me/datafiles/file/14872393412.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/96699405126.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_off0000bf5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5B 20432 bytes
SHA-256: 33dda8141a2e47098ef4d3934b2c44b53567a3027f858f2322e290828f286de4
font_01_sfnt_off0000f520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D37 11012 bytes
SHA-256: 3c9331e88e462042dc61ad72e39b06f37d0cfef4c4e282188544be0b625ae8b4