Malicious PDF — malware analysis report

Static analysis result for SHA-256 a299a3c1c4418462…

MALICIOUS

PDF

85.6 KB Created: 2021-09-02 17:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cf3ff56beb5b318496e183b06f34bc3a SHA-1: b4c76fb0a3031a03701606ca83f64abeed89b6e4 SHA-256: a299a3c1c44184620109987756f45e68453679215b66b5751455b381713d2168
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and a high number of external URIs, including links to compromised CMS uploads and disposable hosting, strongly suggests a phishing or malware distribution attempt. The ClamAV detection further confirms its malicious nature, likely serving as a lure to download a secondary payload or redirect to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://drafthe.ru/uplcv?utm_term=turkmen+language+pdf PDF link annotation
    • https://datawire.gr/files/files/13824172079.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/wawedetotobab.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fa9844d5d28---19031683965.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dinemuxe.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/29264149445.pdfIn PDF document text
    • http://tai-group.com/upload/files/67041049920.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/9aii61jhbvml4plntfomu8c310/jusepevogebovawud.pdfIn PDF document text
    • http://mcutech.net/upload/2021/06/file/16235264451574518830.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/25h8k6p9brcsbjhjqf4rk53o7m/32292182570.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/88610475716.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/93979806655.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/bagiw.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080bd917d04f---75138445740.pdfIn PDF document text
    • http://anm-av.de/uploads/files/warefunir.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb116954d---87655094660.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22b17ac6cb---xosugexijirugi.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/sitelomuvewotu.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/3f20c78aeeaef9974b2cf5b3cdbf940d/ruvegugalofotukugup.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16107d6996c323---sopozesagi.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/15993928617.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/8003f43061a175028f7a9f39ab2cf778/1493359400.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/ajjed2so7iov803q0hg71gmilp/pinivituxuxuxotelimo.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/10727784447.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/c65e04f207ee0f21ea3399d79ad22f50/84216598762.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/a9dcc089cfbcdf61da06d07826bbaf36/84578240462.pdfIn PDF document text
    • https://mediacentre.heathrow.com/js/ckfinder/userfiles/files/4635067051.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 10516 bytes
SHA-256: 127ab6dccc35652476f71738293ae81b135be62698c3041fa14080890cd14c0b
font_02_sfnt_off00011170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 21192 bytes
SHA-256: 06a0ebf5b4efe659e9c17b24bf4620fea937959479089c3eea987f3332db1487

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