Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcb5462fef3192a…

MALICIOUS

PDF

84.6 KB Created: 2021-07-15 09:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ee397628f7cfdd66e83bc3ca5f2e4936 SHA-1: 2619b705e8af5c94d856e85da6c33223373d75f4 SHA-256: dfcb5462fef3192a11277aae71746b39e18f8d9baddf00a4fd2966346d38b4e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristic analysis revealed it functions as a link farm, directing users to multiple compromised WordPress upload storage locations. The PDF structure and embedded URLs suggest it is designed to lead users to potentially malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/427950ad3fa1175d2f893e0b71ca7358/libuza.pdf In PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a89e38816---21085672028.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/4hfq0sgbi7e5b79djt4d7v9qs2/20817433347.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bbedb9898---tabex.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16092df16beba3---senalad.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7ec51aa0e---77362875181.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c739dca1f7---ralujavumobapatesudavazez.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/71204778091.pdfIn PDF document text
    • http://schokobrunnen.com/idata/zerilujavapasalij.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d160a60bc---81957763871.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928e5b8ec8c---mopimotetuwuw.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/83460305870.pdfIn PDF document text
    • http://muguet.fr/sites/default/files/file/43309741704.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/nagirozodixaxexebok.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/e22b12c46ce81457b207a7964ee4638f/71482126202.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92188654b2---348481838.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8f208544a---xefepoxeka.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/22415877224.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e85220dbf5---39501972648.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/vinejikaxilolezoviti.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/likivewibadefelowamizuzo.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/podamo.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/riragiwek.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/5ugmmjdr5jth4t6c0jb7nf2rho/57737486443.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=fungal+infection+cuticlePDF 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://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_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 16772 bytes
SHA-256: 04064e448db0bbd39c0da1c0f525d799d802deb6ae879afbf87fe12f0a65ede9
font_01_sfnt_off00011b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B16 10320 bytes
SHA-256: a2f120f481d01b77fa407a990940e2cd31da46788717253e434c0ff7d7068c66
font_02_sfnt_off00013278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.