Malicious PDF — malware analysis report

Static analysis result for SHA-256 a602ca8ce56ab650…

MALICIOUS

PDF

241.4 KB Created: 2021-07-26 06:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: c05a6d193330f992f01ec2c2a289c024 SHA-1: 6b6820786b26d0f5fa339e58523717cb02c1ed26 SHA-256: a602ca8ce56ab650288124f936f1561edccdbdb56c0a1f46194be9f96ecf2944
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded JavaScript, which is often used to initiate malicious actions. The presence of a visual download button and links pointing to compromised WordPress upload storage suggests a phishing or social engineering attempt to trick the user into downloading a secondary payload. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7733

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
  • 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.
  • 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://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/3a6a9cf4d2b75bff324181e1772f4697/3495572710.pdf In PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/kowam.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/92001678772.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ab2217eb6---dikizoribu.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/sunomamif.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/222b8d65e9fe3a5d0790f97097b6289c/bowewopokawifufad.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7a71a9923---85898567026.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/20630888757.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e558ad3cdb---fovewamosazuwu.pdfIn PDF document text
    • http://poorclarescork.ie/images/lebukevitik.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/e0e94a73ee9915c61a59c5a336364f0f/98460928081.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc8b67706e---kusiror.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/43931379453.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2470c2dae---19991225365.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/56836731569.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/54dbaaf5e70dc918825d9405011c49b2/29732822401.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/27310269230.pdfIn PDF document text
    • http://arvikabc.com/images/uploadedimages/file/ravapapulomexadim.pdfIn PDF document text
    • http://bowenworktimmins.com/clients/e/ed/ed750a77e36579213b976c45729ba45c/File/segorajovitabedonuf.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/5056375979.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b42f0fbd1---pifadudixibosediludi.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b22540e4a---lotetipa.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a97150f8d0---49794362493.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=callie+et+kayden+tome+4+pdf+ekladataPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000293e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x293E6 10704 bytes
SHA-256: c10d4bbe7b47ae36eee1b1fb333f9e9298ac7ab54fe6dfe5a21f1ee8f4921970
font_01_sfnt_off0002ac77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC77 50072 bytes
SHA-256: db9b83cfc9bb3e2dbc2bef422e63a7b6cfd2e90de19f462e5555a5955a1c2f80
font_02_sfnt_off00033774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33774 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00034f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34F86 30784 bytes
SHA-256: bec3fb9b3c431ec38bd129553ab2c3bce4b775e554033c3363325d171ccaab40
font_04_sfnt_off00039899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39899 17728 bytes
SHA-256: 2970d6adce82d076c9c186c657c8e472534bb13b9cc298249d2fa7505b0525e0

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