Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01324db71669ca0…

MALICIOUS

PDF

121.3 KB Created: 2021-07-09 17:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6f0288ca3c640c1cac08d42fea433447 SHA-1: 1b658e55ad6d7534f487a51389e6de30b71a9f1a SHA-256: e01324db71669ca0141523d36bfc0d480aea2a26aff6f30f8f84c5f8f9c3efe9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cbf15b52f---58026010984.pdf In PDF document text
    • https://muguet.fr/sites/default/files/file/lawotulelesewematewawar.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076582ac1f33---86446137666.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/banajekuduvubifevuvemoni.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/gupejezizebenuvemedazev.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084be1ebafc6---88710410011.pdfIn PDF document text
    • http://hotstamping.pl/files/file/36632663290.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/raj9qomqia2nr02ongt9cqh415/11914450081.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/7fhc3adidffq1il0riaruj01k8/59258888191.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/tozafotegoditidosep.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/55b514ba6901eed68775f48a27bd9e77/durafuwuluvapavinigoduz.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/89b227985e9667a0b8095969ce3e4936/78395781920.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/kebemevotatix.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/0eda6a422789f061bb15cb334b80b49d/bapimudas.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///18532889901.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1eaffb6190---51283699980.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/marefibomikoxujipanew.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160928bfdcd5ec---zidurex.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/zinafax.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160996d929dd59---9301116409.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/lozabozetut.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/8a70ba4550f5f1219a0e99922bacd4f7/74789519690.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/23451566261.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/158ddd6e32a82aa31860333a4074d09f/99094943933.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/81160897733.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=out+for+a+jogPDF 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_off000177f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177F8 10100 bytes
SHA-256: d2fa48315188402831666a20b50e9d76a67841dce9f6d653e8ce8d846563ee46
font_01_sfnt_off00018eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6BE 18896 bytes
SHA-256: e53d41ea0570f1abc83a2f4cac300841a198607f92a8fb6af2c9cb5843518afe