Malicious PDF — malware analysis report

Static analysis result for SHA-256 6adb19f875970964…

MALICIOUS

PDF

75.1 KB Created: 2021-09-04 23:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4bcaa109aeeb051261d1499a8d008487 SHA-1: 5c62ddb797a9f8adf74cc7f3a0c13f816b660d22 SHA-256: 6adb19f87597096428bf45a8f373275b2d2c90f7ee9e763f5b0200a791f346c9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://getdol.com/page_data/file/68074392166.pdf In PDF document text
    • https://cmsschoolkg.org/userfiles/file/59011882012.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/8e00e3e0984564d643764539a724793d/tutatujuzozarifadujok.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/l37so5bet4f2sm5llc1oajns7l/1226969035.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/vutasufu.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/goxavenelaj.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/ridonikezikig.pdfIn PDF document text
    • https://bem-sa.com/img/file/71436906607.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/26629729599.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/jb9ghk12sm06r7863oksmhveq1/bukixabubugemibavixuva.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/muromufepon.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/51513172057.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/d54a35183b2ddfdc6d161e85a1a0becd/18463054179.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/jirajesamuresagosifopunot.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/88908507069.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/755unjo774c7423l74914algp9/tatuz.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/rojoxurowedozeko.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/3c7b389271c5d714a621c7c6bc020589/bogofakowalupozizubovopi.pdfIn PDF document text
    • http://gphs100.com/clients/e/e3/e3ed30f4e85b1ff1e74f61348c82e8eb/File/4143248414.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1b623976c---91469227507.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/da0734a3c20b65affab60caaa9a26aa3/sesimisobuwawegaruxa.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebb9518cb6---47693112781.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/nitilonunozoziluf.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e2316f20a73---1200510144.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=lxx+bible+pdfPDF 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_off0000c754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC754 9936 bytes
SHA-256: e172fe4c2b693541f192314c9d9901bdc79c630b8e13e4dd0d00d61255b5e15f
font_01_sfnt_off0000dd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 16172 bytes
SHA-256: 0b66b702094b0eab0294cbf1fb7da91b355ddeb32171dcbcc73dfa6062e234f8
font_02_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1