Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8d2284b1f1bcc3…

MALICIOUS

PDF

91.6 KB Created: 2021-07-01 14:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: da873abee91b3c0c550950cdd80d15e6 SHA-1: 87662779dffc4461ac1b945b4f37c1a8e55f0d33 SHA-256: da8d2284b1f1bcc3590bb842d0e9db0a9096202816b02c298c99a01f31f29254
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a 'clipboard command execution lure', instructing the user to copy and paste content into a shell, which is a common technique for executing malicious code. The document also hosts numerous links to potentially compromised WordPress sites, suggesting it may be part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/esdd2nkg0rvb3ak4l4igg0gu84/34104644703.pdf In PDF document text
    • http://caratow.eu/userfiles/file/83660218989.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/92867198840.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160731c2434eb4---73064327397.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ba111c8f6c77115803be24ecea894a41/pomesuxakijoxi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/085f3b50f64a684cd260e3a613fa6015/fijetuvum.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/aaffeed9f5025ad001eab959ed4ceaaf/87403581881.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/ir1us4pcsd4ps58evureh8s587/golekubukib.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607faebe30368---16214481550.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/kidukoniroluxabekenu.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/dfcea46f5fed9dfda73c8a13eb09aa05/bilobowisubofesimizukisu.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c4cc148d---xiziwisalutigoluzeluro.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2fc0e0bac0---36580606189.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/221db7c168f25b0c21d7e782f749d123/18097333705.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee6679dae4---49918784579.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/6e78d6ba104fe2d6cb7ae6d276c2a0ae/92372063313.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/558a321860aadffecdde0553a635dea9/92200414405.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/37e5c698e5afa7e79dc0306c111ef0ab/vixadikisuxu.pdfIn PDF document text
    • http://yanartextil.com/firma/files/49577174241.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0d73685d9---lidabef.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8fa3e7ec8887529f712c56f200313436/xewezikazukuxobum.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/d4797e2f77c0e3fc32be1fe6427d2ea0/79457865845.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/pokotudibagedokalarubado.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=microelectronics+circuits+7th+edition+pdfPDF link annotation
    • https://mediaget.com/userfiles/files/vetasajodapo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 18732 bytes
SHA-256: 1e819937e604403108bc0efeaf533fda4fe7e2eb48580cc0956c54528a5cad3b
font_02_sfnt_off000125cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CF 10700 bytes
SHA-256: 89d1e0005536116a9304e4665d36fb70723b872969c924d4d1e972701d50c566
font_03_sfnt_off00013e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E50 10844 bytes
SHA-256: 4f1c0e2ab9ee9624e6f442c6495ed442a82e90f725222aa8a0a2de37e15c01fe

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