Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f43b8b53a405c2…

MALICIOUS

PDF

91.9 KB Created: 2021-07-07 04:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 830878c57bbadc791080bdb92e11cb04 SHA-1: dcf9f940ce39306568729be49c1ba6380b3bfba5 SHA-256: d9f43b8b53a405c2c9f448f9cdc846c417dc12a21ae5442c021c5137fa339331
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous other PDF files hosted on compromised websites, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and link farm heuristics confirms the document's role in directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3080d5b91---zirununamadamokulaforamo.pdf In PDF document text
    • https://caribemed.com/userfiles/file/32266073046.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/0f6641caa141dd0ae9b16efa39c03417/xorigotosono.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/a12000b112efe56e97ab0a8174e30ddf/dedotiresafipubagil.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/75738699638.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3cb600561---80274245435.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/vuresulawogitupedafetu.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/06/16/99352011831.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96d693c1cc2bee57587662762652b2c6/rifegepujujulob.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/bebc96d1fd512ca8d1691358a59542a8/86370395986.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/dadegapefupadodofazib.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/59228717114.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092cc1cd4317---jewigofufuxewomizeraf.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/13a903bf7c7a0f945f58f2f556750c01/93557239627.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb3d99f0b5---91601049400.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/lituz.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/087b297908d13b9b300af29dd49bfb88/57343881790.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfe308f6d3---23972028963.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/tff6ie87f2mbgsvhcg91n5iq70/purebidovikax.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160839e83bb776---91323060399.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/boguwixutimavi.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d892c96c6d---2628143806.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b116c695415---desejukinosi.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/4caa1054f5c48d624c56598213455f3a/17793780314.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe5a358e41---fudugalokesefip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=post+american+world+pdf+free+downloadPDF 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_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 17488 bytes
SHA-256: bfd4998e2a112479c9a85563350587d6ea2ae55b1e7e4b3870ecb2a73c1257f4
font_01_sfnt_off000130ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000148c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C2 10868 bytes
SHA-256: 4bc697983f47e906d8f2af5008becaa3ed906de83e844bde56d4698822e182a6