Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0433134e9748e07…

MALICIOUS

PDF

84.3 KB Created: 2021-09-14 13:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e02c2634182e322b3c72ec2071936ddd SHA-1: dbd37e140e0fcb65526da2e26ad18e5c3b22b5a8 SHA-256: e0433134e9748e07535b3c7706e92cfcecbaf89483f0f94860683a2d37870082
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://webaprint.be/img/file/ruvite.pdf In PDF document text
    • http://myappartement.de/web/editor/files/80587288343.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/guvome.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/32559543099.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wumanu.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/52664996499.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/0e017124ac91eea8095f9f931d2376e0/74286245541.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136e5fbcff04---vibetogafikiwukejadomu.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/68591944126.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/risokilowagedamavewate.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/wanotuzomoveludibupizazit.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/82194809115.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/kemiwisavovowox.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16136c6b49c777---16164969956.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365507a839d---ranobinekijawazodesogat.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/vovabevabelulow.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/remalisulexotabupijo.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/2557886363.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210902191812.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/2999856404.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/10da6fb6d47b9509d957e8a05f2902ea/16488332061.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/at8qta0qivd0v05147aatbkdn0/vaxonasifukurenideg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=kny+movie+streamingPDF 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_off0000e08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08F 19624 bytes
SHA-256: 273eeb63b49696519c75ba001a02977d9313c8b5e1ca9d0614964d8b39cefc17
font_01_sfnt_off0001138b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA2 10576 bytes
SHA-256: 8013774bf3f8a030b7e7afd0a1fa8231866bb3406521e6a37b60f03f2810052d

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