Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0ffa103a4235af…

MALICIOUS

PDF

96.7 KB Created: 2021-07-22 16:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 473876440b7931cb4c2df398e8d751d2 SHA-1: 3bb32714ad72e3bd492ebfc060439ae730010b9d SHA-256: 2c0ffa103a4235af761070c49b59c6500fcb853e17a24567cdc86bc59c85bb79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, many of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://novamakine.com/upload/ckfinder/files/digabafaxowufuridapowuliz.pdf In PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/3dc280016f8942d41bf4d6cd267e8615/91140769261.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/b6307b3b33d06ff99af944986a1276a0/86740795128.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/jolikurukujilujepi.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/91224572224.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/e476540b8c476404017143fb070ba342/3966177525.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/29e38d0caadb703f5bc701e42a7ef474/japasatopoki.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b111e8e72---90828156444.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/dezidaxatogikor.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/diratizabatipepetabugo.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/0f8184484c756d88bc3fa4ffe99dbc7f/gasowewalaxenasitodisawuj.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/b1op2uhjmq5605jlsel62mie6c/46962091304.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/96179791998.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/nevijokoredexatu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7q5695u16u2fnf22gg3ksnfmo7/49845078752.pdfIn PDF document text
    • https://tavio.ru/files/file/suridu.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/wimuzuvabedemukaxomofo.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/getudigadofawiv.pdfIn PDF document text
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/48662454616.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/43110078161.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/114529258960e11dbacc33d.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/gegomuxo.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e72c561d2---fibijawifapivepugoxake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=building+wiring+installation+and+maintenance+pdfPDF 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_off00011451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11451 11204 bytes
SHA-256: ff3b4f5c0ab3d6200d96bc68c87be74bc3a11ccc5c5644332839774086498372
font_01_sfnt_off00012e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5F 17264 bytes
SHA-256: 6268091262b9c04b4685561891f64b31caddbbf2c80f5df08f7e5e53bbdf307b
font_02_sfnt_off00015b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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