Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c67a0fd593b2d0…

MALICIOUS

PDF

87.7 KB Created: 2021-07-19 19:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: df4db8bbd66fe640f945de49827b8eca SHA-1: e183b7013d87ff253b98a26f5284addc844e3a09 SHA-256: a6c67a0fd593b2d0507087aa61b926fe47294a490b318edba92dd800abd43fe7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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.
  • 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://apluskleaning.com/admin/images/file/91418523052.pdf In PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/5rtm2f0pi5j13b9lh4utj40596/witodemegexivisidaw.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076201c848cd---49132481145.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/34244825397.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bfba39b7b---18119512736.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d5929dc32bacfff0dd506ee51e95a52f/13743319922.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160988487b7f68---jivajeleroxetisevuleb.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf6f129335---todikowo.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/mulixorozefawexenorofe.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021062102292073499.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/bixurowe.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/930d9eabacb781e873acedb269298d3a/farejuxoxogu.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/fusoferotuwesiw.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/57563723971.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/rugazuvivekotogifo.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aad089bfa28---12809416307.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0df65fa7b---5589888595.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/pdvvvma8rvtvd905rle34837p5/dukazufipilavodimatipe.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/maradogupogelasosukode.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/a13081e80c79d347a46902d83cf9afa1/8205823167.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/gamebitore.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/denanavizobaredepupatit.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b37fad82bbd---sazalezap.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac4dbe9b27---68448721037.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210615_A3C727F62107CD3E.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/38386180761.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=york+communicating+thermostat+troubleshootingPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#Referenced by PDF JavaScript
    • http://purl.org/dc/elements/1.1/Referenced by PDF JavaScript
    • http://ns.adobe.com/pdf/1.3/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/mm/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/rights/Referenced by PDF JavaScript
    • 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_off0000efc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 17744 bytes
SHA-256: 229836f3be776d793ffd158c4d721fc7a4362a0ad8ae45b7f0a5bee31d7594b9
font_01_sfnt_off00011dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C5 10992 bytes
SHA-256: 68113fa8acad4f45beec7b93fbac4c635852a403142d7e25bef666475d5dc96b

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