Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3f579bd2f14cdd…

MALICIOUS

PDF

72.6 KB Created: 2021-09-13 22:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3c72e05156b966bcab3b2ab0df56b1f0 SHA-1: 226d6a22a930eb31c9bc75e9f435d2af67947153 SHA-256: 3c3f579bd2f14cdda1f000731b6970027445af158f11a7fa5ef8f4d00076301d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • 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://adhunikjewellers.com/ckfinder/userfiles/files/kebupapitefanezovev.pdf In PDF document text
    • http://movitecnic.com/ressource/site-image/files/jerolotiputekeralap.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/f94762cb83fb75288f1753542baa8fc6/wovizuzavadegemivovur.pdfIn PDF document text
    • http://feminella.ro/upload/fck/jikijibebev.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/32919571483.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202109101047487835.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/satipimelirowogum.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/vipisifuvumudopu.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/725693cd3c119185d477823dabe77f02/polarevuletulogafisopaseb.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613349310a55d---15391902711.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/podevogixivaju.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/ridofalejanenavatifo.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/29527010098.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/vesuroxigex.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/13308789117.pdfIn PDF document text
    • http://farmina.ru/uploads/files/4714898998.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9c14c8693---25394571393.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/93652484482.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/733afhr7aibc01tp6vl312g2av/ruxobuginovibusu.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cac0d5cd1a---62438924517.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/87450340336.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/kokajiligewokajejeraxes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=bubble+shooter+extreme+2PDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/77183414861.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_off0000b9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DB 10528 bytes
SHA-256: 6996a44d330504b9a06795b16975df6eedb6adf6f7c6ff116fc4a79fa385e574
font_02_sfnt_off0000e9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 16768 bytes
SHA-256: 8ed4814406f6b44e6909679f8683f7aafdf9e34d554efe50203d344551a01d38

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