Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc03ef03b2c55d2e…

MALICIOUS

PDF

80.3 KB Created: 2021-09-15 21:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c9dd637786cd90de570123cc5bfa3e22 SHA-1: ee3e8e48f30d6e87661cf29bbe0b60756136eb24 SHA-256: cc03ef03b2c55d2e7dd3af1dbee430b6c42dd5cb3943e81a0f1d9c6c7b1c583d
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URLs were found, many pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or redirection scheme. The PDF's structure and link farm characteristics align with techniques used to distribute malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://irlanc.ru/uplcv?utm_term=android+double+tap+to+wake+settings PDF link annotation
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/zenukisezevagasixi.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/39351260308.pdfIn PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/36240482494.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/ximulonume.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/83427997445.pdfIn PDF document text
    • https://guijek.com/userfiles/file/99018978952.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/41825890279.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/625d23319ccbdcd8b89cdabfd00ace57/fudupufirazisavisorini.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/92445593380.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/42175047557.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/vulewanegiwelegod.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/jemifesawuwimewaposom.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/81585742502.pdfIn PDF document text
    • http://mtegl.wsystem.sk/userfiles/files/30289469220.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/40540967165.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af9eb21298---70029079057.pdfIn PDF document text
    • http://cocoabuterol.com/upload/files/39169481447.pdfIn PDF document text
    • https://spacio.hk/attachment/file/21069938073.pdfIn PDF document text
    • http://asja.ua/userfiles/file/26948895945.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/bebobajakumekezepe.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/55351798295.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/18675174650.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131d0f545fd2---somavorobimarelax.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/80848400801.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/geteneniz.pdfIn PDF document text
    • http://specialcats.nl/media/files/45313486148.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/nusemik.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_off0000d290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD290 18028 bytes
SHA-256: 898ee7676e4f3a49164d4cfe4e981fa9f2dcefb01862baf0e180fbc8054e3962
font_01_sfnt_off000101d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EC 10964 bytes
SHA-256: 62d641814cba7a367c89241dc6f762da2ebc3a3fc363a8f9d0313caaa5608121

Open this report in the interactive analyzer, or submit your own file for analysis.