Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b5b772906370f3…

MALICIOUS

PDF

130.9 KB Created: 2021-06-28 09:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 18c4f85605420862a456af3848cd99c8 SHA-1: e9cac1433f943da50ab8e8b08319dc11348d45de SHA-256: d0b5b772906370f306df32c3c796cbe9df4f481a09102ecffbf7370b9474f6f0
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage, suggesting it's designed to redirect users to potentially harmful content. The presence of numerous unknown URLs further supports this, as they likely serve as part of the redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/1puuq3trhdc3np046tr2kg2cg3/38832539107.pdf In PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/4f5abe9233655dfef03b233c43995eb5/70963239085.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2cf8c1b9e---debusajujavasopojezivivap.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd82941a56---jupojamuguparixelexo.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b38588e7dab---86304361661.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868f392b0da---debibedifojufiduse.pdfIn PDF document text
    • https://amblamy.ee/upload/file/5747962146.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/95415632196.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd08523634---24187024603.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc8b6ca9fa---nejezejabebukabemodovomu.pdfIn PDF document text
    • http://ozari-ua.com/files/file/8997804449.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/20b6af083f0f720d71bed83ab0fe9e4c/27585289490.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a076e43990a---tinivutavifejuxisev.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785c3cd8f29---76654006876.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890b9de542d---petakajo.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/4be85dcf562544459055a211276a8daf/3229871178.pdfIn PDF document text
    • https://ovth.ch/userfiles/files/dosefonufaruwotiradub.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11f7775946---mozabosigo.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/27edd2882f5e773aa0494337854c7bfe/70629795401.pdfIn PDF document text
    • https://aspirans.com/files/file/181722062.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/vizewevujabogeb.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/a3a2e474a6de2d6ab53f58aa8a63b43e/bopuramovovuxole.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/be519902326a8765a92b4159525d4bb3/13290161810.pdfIn PDF document text
    • https://ckmandarin.com/uploads/95696620091.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=animal+farm+characters+chapter+1PDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/kapavuwonimomux.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://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_off00019e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B61C 10656 bytes
SHA-256: 784967ea77d3a5f49bee5d2fe9582d5298450560095ec18d4a90d5424136de79
font_02_sfnt_off0001ce59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE59 18248 bytes
SHA-256: 38b3f4ab20200297f3915040cee8df37940d1f96197a8b398135a87126d131ae