Malicious PDF — malware analysis report

Static analysis result for SHA-256 c711fa8f11fd12dd…

MALICIOUS

PDF

85.8 KB Created: 2021-06-25 15:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 24792633e0b90857ccdd379e817fc14a SHA-1: feb19794644667fffc309e69ce1dda77ad67e281 SHA-256: c711fa8f11fd12dd67c36b15f3b33ee547fde56913ce89c6092dffc3cfc85718
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple links pointing to compromised WordPress sites, which in turn host further PDF files. This suggests a link farm strategy designed to obscure the ultimate destination and potentially distribute phishing content or malware. No scripts were extracted, and the document body was unreadable, but the heuristic firings strongly indicate a malicious redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f69351d511---49774855243.pdf In PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3ad4447ef---xazagaridetabemukevawi.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/76vjkutqe2ugj3kefm0e4vsc56/vubafulodubikon.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/73059275790.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddaf143224---buxawogukukifavemotokig.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/rbvdqndhafqbp3jfaafujt7o70/11520562014.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/xafogesagepebipuvezeg.pdfIn PDF document text
    • http://artospace.com/pics/file/68550326124.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/37a8b7786bf9c33eff40c2ae163343fa/98673396315.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/61591993623.pdfIn PDF document text
    • http://aps-mes.com/files/file/wanixezogitoturon.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/846a6020d71f5015d7da4342ba7b5671/rujubo.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/6019411109.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/977dd2fd34e896e4be4cfa0b32cb5330/dajapibanigiw.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/43191422243.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/fijatajin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=small+nosebleed+after+hitting+head+babyPDF 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_off0000ecc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D6 16376 bytes
SHA-256: dd590c1fc53473780ad116470a7a790689267d7990ccb424207443fd9f597b7c
font_02_sfnt_off00012f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F47 11128 bytes
SHA-256: 4f025e46c6b310c38965b7d941dc93d903e1a56579e4fd6dc880b4b26f813d25