Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0abbb8ec13de07…

MALICIOUS

PDF

85.5 KB Created: 2021-07-19 11:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7abad104f33e957d213cb85b8dfcda2f SHA-1: 8ef3d4e66fe4318bc9da10a703a42552eed0aecb SHA-256: 4d0abbb8ec13de073f372599053084b62cd9b9d41e8f286114b3a62e32927af8
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://ventexevent.se/uploads/file/10639688494.pdf In PDF document text
    • https://rcot.org/userfiles/file/35148318414.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/5696269567.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/xajilegimodinufugetevit.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c265ce12ab3---muragukuwejibix.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/88b943a87131de39bab1a504f8bfb1eb/bubujawuxuveteduwolo.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791ae99ca6d---mubimobafizulejudosijijus.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/34139848305.pdfIn PDF document text
    • http://whewfamily.com/clients/12004/File/nakexatuter.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078955008f89---xijiju.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/qqavggcol84sslrkh1f36hjfff/bebabibet.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/wexubirusijivupen1622282170.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/klg6m7a0bj6b1940chv0idhq07/11998111300.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/belabu.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/mefexujarozufijit.pdfIn PDF document text
    • http://halaljones.com/uploads/files/25494421151.pdfIn PDF document text
    • http://guchenes.com/d/files/10268680890.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/de160ac8d55bf732c24ce60d912524b8/98095823340.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608361e078931---46745015013.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/zonopina.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/lelewala.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e1289ab78e30035f8542d2046f4cab9a/woluxikesiditowewaweb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ver+red+shoes+and+the+7+dwarfs+onlinePDF 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_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 10556 bytes
SHA-256: 65d82d1710d061a0765ac52dd25927132f80bfe82b5e6fca38e892fbeb3be12c
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C26 17692 bytes
SHA-256: e22d4fe293838649d010a58ed08321bee62dce171dd6d7691db54e4ab4533388

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