Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aaaeddf08cfe719…

MALICIOUS

PDF

123.0 KB Created: 2021-07-02 07:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 02d2e80b9b0df853366ea8aca930813a SHA-1: 5d8c8ad28a8a0757a7ca5442eb5854feb4883005 SHA-256: 1aaaeddf08cfe719b407efac9af76805481de6f052bc1b95e52b6b6f86c5201e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/v7gvf0kf6a2mv207j9s6l0r1g7/30065721217.pdf In PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/353a5dc50266d01f9026b98eea942278/boledux.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b5a9db549---sotopudebugebon.pdfIn PDF document text
    • http://plncse.hu/php_data/file/rixoposa.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/e7ra5gbm4ue486njjtlr3qe55h/28277387042.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/26657997063.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/dabuzudesoxodezimesu.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081323b80052---notejojujulopigoru.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/dusenagazekudejumesediz.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091739b2a4ac---juwubexozugitugovas.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c608cf871dd---84443100402.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/a2e0e4a482cbb56d69787a85ca5dc636/39027549213.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/fe58b29db51eb8d963c2c4c16a22d95c/bolov.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/72164555187.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/be27c2341f7291fc7def4af8b204fa3b/karexiderumutumamirepevo.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/xakupuxovikawozobupikomu.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d64eceb0a---poduvuzobixoxevija.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/dukeni.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/kixixo.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/tadepal.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/26d63d7722438ad30631359eea7f55d1/28962099421.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2evfa1gpvipopdigb7e02a1dd5/jegudi.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608b703b09291---fulolobakitojafa.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/87652624618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=lewd+gestures+meaningPDF 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_off00018220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18220 10568 bytes
SHA-256: 5fcdf78169a22df11ce5b3db477d320861d928a973ab6da8f9e45d3023dba9ae
font_01_sfnt_off00019a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A0B 16396 bytes
SHA-256: feeffe82621fcff31836c4d7511a0e19e4abf131ca9639550bd44c070984b5e8
font_02_sfnt_off0001c4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1