Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68b80e56d7d6eff…

MALICIOUS

PDF

79.1 KB Created: 2021-06-18 04:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6adbd37d389d64c671b23ab4830ae06c SHA-1: 915e937a10e5615f89f8b5edd2a94126fb4e1fe2 SHA-256: f68b80e56d7d6eff2ab40a3bb22c9c9cf7949d11b040266095284707354af16d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit users through malicious links, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609451298c73a---mokon.pdf In PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/07cbc71821bee641d992e842bb970c88/juwuramaxuxudebizuxu.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dcf68bf41---6496565660.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/93170227139.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/botepopabaxezezel.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43e2824d8---rulazoviwis.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecacdde2e8---2426894217.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/7c1d3d0c15dff2e2f1d137db0445bc17/sakida.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a98ca9b2f---39308714905.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/539bb66b8277a194fdcdf1142b8a1438/jobazulajeniw.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/24582293746.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6148dd8881---laxogofowux.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/fetegopurefonavoxebim.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/9444968254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=all+i+want+for+christmas+jimmy+fallonPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/d822e43a57734f0aa25694eb377f9d79/69857524867.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DF 5380 bytes
SHA-256: 5031f42f070d161b2d3da1b76039f50f36152cc3c8200f408681a8cb1275692b
font_01_sfnt_off0000e818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE818 1716 bytes
SHA-256: c0e39f44321a474cc328806e737293db5bfd2873d0430c567f64257ef24eb06f
font_02_sfnt_off0000f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 11360 bytes
SHA-256: e867199a4d9dc63ebb0b746781938ca3ec7b04104a4aa6fc36a48192a208424c
font_03_sfnt_off00011775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11775 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443

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