Malicious PDF — malware analysis report

Static analysis result for SHA-256 0225502e8a266b36…

MALICIOUS

PDF

92.8 KB Created: 2021-08-15 02:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 19983831a408b95b6d5837e5325f04e0 SHA-1: 2b6d05f52c863fd9dd8f7e83d0b62ea923446d47 SHA-256: 0225502e8a266b36f9838073b0239ed5c2460941b941e5e7cd45cc82d9fd37dc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which appear to be compromised WordPress uploads or disposable hosting. The critical finding is the 'Clipboard command execution lure' heuristic, indicating the document instructs the user to copy and paste commands into a shell, a common technique for downloading and executing further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=what+receptor+does+gaba+bind+to PDF link annotation
    • http://www.advokat.com/app/webroot/img/fck/file/sapafetenogerojolaz.pdfIn PDF document text
    • http://manajrgvaaradhi.com/cms-uploads/files/simafu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa81d88cfa---9582807892.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/f7b811c4488196f0f40e183a4bb2dfc7/zedeluwatowurizixupidudik.pdfIn PDF document text
    • https://mashura.co/userfiles/files/filunaxibaragivafajut.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c67e7d1158---53235636305.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/31776524207.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/161032aa65b25b---tevobebotadikusujuxasexa.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/s4nr11h93gsglkljjfj51r62i1/tumujabifi.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/jonuduwe.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/kivifete.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/kibozidujaneva.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/gevavex.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/minisoxexunaragezejuvati.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/bulezapotukumuxafawe.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/litobagupefaxo.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/3db67b9af7d6dcd9e0e0d091d051c212/68423335519.pdfIn PDF document text
    • https://ikima.fr/uploads/file/20050174070.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a92c6eec28---38172904294.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/14630181708.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/2237656237.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/uh1pnj48g57bsnm68vvkb2hivp/50241010370.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d52e4bcf6---sutamuliwubozerepux.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_off0001067d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8F 17228 bytes
SHA-256: 21cbdbd69e6f7368c33cc09d29f1026ae59b971a6fb9b35b07239808d347690d
font_02_sfnt_off00014b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B72 10880 bytes
SHA-256: 16702eb78dcdcc0e34306a8b96cc30532185647b32737e88af63da5c6df77784

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