Malicious PDF — malware analysis report

Static analysis result for SHA-256 82dfcf7665037663…

MALICIOUS

PDF

84.1 KB Created: 2021-06-28 02:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95c0e24ff2c6b186818508da94340103 SHA-1: e522012f1ac6f618863e82eb9179c63f1693c10b SHA-256: 82dfcf7665037663e95c6d930ecb819ce2000133b791fe60504f3548c9e32153
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating it likely exploits a vulnerability to execute code. The file contains numerous links pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism to deliver a payload. The presence of these links and the ML classification strongly suggest a phishing or exploit delivery attempt.

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 http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905862562c3---50501019108.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3f6438a0---83758769917.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/0ans0bdcba912t86en9sekjquv/94944407212.pdf
    • https://kindeeyudee.com/ck_files/files/lasekawebobufonigebipe.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16071c58fa2e28---nobupikelotuzegipiko.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/7d17f1144d314587d14ae2b91b6ff86d/20387148871.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb48882783---jodepujemu.pdf
    • https://publicbridge.pl/userfiles/file/misanira.pdf
    • https://ozmutludokum.com/userfiles/file/dulazujenebazip.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/c28e1b9d0e058ed93910f4e0356b186a/8164580708.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/95b4ab534dd36b84dce7fc799f9101e3/17816343476.pdf
    • https://ph2020.org/FCKeditor/file/31039966020.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/erhbfrdbnas2ns6v5ommrirs8e/tararax.pdf
    • http://andrelandberg.com/userfiles/file/28899809923.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/ee0ace563675ec28998beac0f14ded5b/40318711091.pdf
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/de9053d4d189537bb65eb91c961e13bb/89852476451.pdf
    • http://turatabor.hu/media/baditiwadikakejutu.pdf
    • http://qunjl.com/userfiles/files/83076299077.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/794c1c3126265efb29e7c3af08b617f5/nimirudowoj.pdf
    • https://hondamienbac.vn/userfiles/file/xonijibetadulomedoz.pdf
    • https://eyetracking.pl/userfiles/file/kelijatubu.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/96d74efaaf61b0f26a86e3e6ffb9c791/40067390534.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982eb779853---ronapojafojiw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=impact+of+growing+population
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8dd.bin
657c8f6c1853300a47884540439d8077e594201c8287af9a4b84347c65055c05
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DD 10660 bytes
font_01_sfnt_off00010150.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 16792 bytes
font_02_sfnt_off00011962.bin
8b81e7c4c6e1003b2602b8b1b7584d07d663ed94f4c611e1ed28c5b7b4a7c636
pdf-font-stream PDF embedded font (sfnt) at offset 0x11962 16232 bytes