Malicious PDF — malware analysis report

Static analysis result for SHA-256 294d2cd708b63650…

MALICIOUS

PDF

108.7 KB Created: 2021-08-01 06:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: af4f4fd70e0a83fbcfb995b628d01349 SHA-1: f80cb2e5a0d5bee2aafaa652a6bbfc39d581ba52 SHA-256: 294d2cd708b63650a7bba4ae8716a2d4305fb1e3b3206af1abdd37172467f9af
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of external URIs and link farm heuristics supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

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://shopcloud.cloud//ckfinder/userfiles/files/laworenulej.pdf In PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/fivilawidegavej.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/benanoj.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/pidujerudodubatujeviju.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/37348260513.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/76b0733540042b80fde68586a83fc7a7/zareloralivuzijojukibog.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/57493415352.pdfIn PDF document text
    • https://paperland.bg/uploads/file/tedupotatatukit.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/vigatupotarizilamunigikab.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/89950066408.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/jovuzuviniratuvapinenot.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/44413326807.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4a3aa19ba---33790743339.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/95067657381.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/95809797899.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/nefudosazazuwos.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/096d0316a3a51e210a5612b70047b282/ruradudotimovuxaweva.pdfIn PDF document text
    • http://mamitobe.ru/files/file/malokirukamozerogorexinef.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/85556699098.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/u67doup8na3ab7a9rgej26phuu/noriziko.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3195762e4c---68522979929.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/kemazunitesapunujevanir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=naruto+blazing+hack+pearls+no+human+verificationPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12572 18008 bytes
SHA-256: 078edc405637e038221b8a206487fc75b288273c700697905796dc76ac33f255
font_01_sfnt_off00014184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14184 11360 bytes
SHA-256: ac23f3612bcc10382feadf975db6e32aba13f89bef93ca3c0cc00b73747df8d2
font_02_sfnt_off00015bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BEF 17136 bytes
SHA-256: 3bc024d3753d46b8c7d181d95e0bc8c6b446ef3bb3ea4bd74163201ab6a330d6
font_03_sfnt_off00018915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18915 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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