Malicious PDF — malware analysis report

Static analysis result for SHA-256 0728d01230fb6752…

MALICIOUS

PDF

87.6 KB Created: 2021-08-03 08:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bc0a8039796a76e3234cee732f49a2ff SHA-1: add8132f2be30c657ebc508b2c30d529cc286fc5 SHA-256: 0728d01230fb67524ec1d3c2a6fb044357cc34bb44ba68b856c00e1e509be566
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains embedded JavaScript and numerous external links, many hosted on compromised WordPress sites or disposable domains, indicating a malicious intent to redirect users to potentially harmful content or downloads. The presence of a visual download button further supports a phishing or malware distribution lure. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=acer+aspire+5733+wireless+driver PDF link annotation
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/bedijepimirediko.pdfIn PDF document text
    • http://masonlegacy.org/clients/61515/File/radivowivupazowizisaseza.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b05922ae75c---17853112461.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d73a246a8---94640937006.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/8467960143.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/55301993382.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/js8opfdv9952nq5uohirktsq3a/37620129879.pdfIn PDF document text
    • https://cncunse.com/d/files/bugejaduvapok.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/31195068842.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5be7c4abf4---67465065857.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/juxeludanafot.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/me2rrlcnn36h5fogaus075d422/42613323213.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3be23808fe---58763377434.pdfIn PDF document text
    • https://noddy.nu/images/file/gigifomipuriguxudu.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdc81d1582---birejogodowig.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/redaw.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/tft2450mqothdmdplrq54sn8p2/fubijegipidozugevep.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/9a19f962600375fc5f97fa1306a3af7f/fimikafud.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160772874af570---tibekatujesanodo.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b4a599726---91174586994.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/fcf2eb016317e324d188e2176710c8a4/merakipotifoxu.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/lefofizafat.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8da238559a---20611431179.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/xajuzogilebexunidadepowa.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4f66dbdb3---gijujazitax.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ppna5v732ipq3hvm1ugos3ciou/kopimimaderomoderimewu.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_off0000f346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF346 16916 bytes
SHA-256: 63590e46535394a81a04bde711746bf38241c825927e66e5586201d3f401aea0
font_01_sfnt_off00011f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001379e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379E 10672 bytes
SHA-256: abc973f4c820a126f21654e9c6e180819b134141e051ef79a65f0335a2a961bb