Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1b47dc029aec48…

MALICIOUS

PDF

109.5 KB Created: 2021-07-02 08:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 78b7a442e48948ed6ff22db29d021ce2 SHA-1: 30560442c0d73982c1a00b2da77098befed1c8e9 SHA-256: 7b1b47dc029aec48f69ce1bb6276a5ae2dc0b825959f0f22036ebf2cce5587c8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging compromised CMS uploads and disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://coretry.ru/uplcv?utm_term=boy+scouts+reading+merit+badge PDF link annotation
    • https://angkoronetour.com/userfiles/file/18693470775.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/35096292358.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210609_D9797F334B7EE285.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/34781767475.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/90523719172.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/eg489ob800n52o8o625a7g4ka3/kelekelejow.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/65308694879.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/jga8d3k547ps215vf9jrima463/82725469632.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/58339605105.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3ef246037---litalowesuwigivutujetapi.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/32894774851.pdfIn PDF document text
    • https://oumkua.com/userfiles/file/lilewirokikametudebevib.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/kkjj1e64j4tok3ettmll9i64po/99347166877.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ctl7flc4qnkgllscs6f1fqb6a4/tapujuzaji.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/siwikodepu.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/81544195824.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160cbea5665ed5---59688745189.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb8e02d09---3486899888.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/19699203863.pdfIn PDF document text
    • http://skncn.com/u/files/19756689491.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26527964213.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/58679120537.pdfIn PDF document text
    • http://altinay-law.com/images/file/velojakumavewutipero.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_off000149a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A4 17344 bytes
SHA-256: d44bf5412dc807da97d06ea1091e12a5f3ea2ed5b45db66eb97dca9e37db0e36
font_01_sfnt_off0001774b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1774B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F62 11076 bytes
SHA-256: a012696af0a812d0d5ce4f0d9940540a2b6e70fc10f75685fd2fe3f8cde99ee0

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