Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc67bbb9af6dcb60…

MALICIOUS

PDF

93.7 KB Created: 2021-06-25 23:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d913d867b6ca0e5f912928237c3d024e SHA-1: 4b93a50e0ab3b13522045636765017a77dc8498d SHA-256: bc67bbb9af6dcb6043cb547ca6117a47fafd6d4ae6596b9a6dd797aad36c6d1c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection. It contains a link farm pointing to multiple distinct hosts, some of which are identified as compromised WordPress uploads or disposable hosting. The presence of embedded URLs suggests an attempt to redirect the user to external, potentially malicious content.

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 https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ec910bbd6c015f3c93d986449a345ca6/tupilevaj.pdf In PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/e2804ca10f73750c22087129701dfd88/82691130933.pdfIn PDF document text
    • https://nestuby.com/userfiles/file/paranitib.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/12491040219.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/korugorenezil.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160cff9ce4c075---mawotomajodijeviwobipowu.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d818eda2e---65299743726.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/47f71f6d6475b0bfe658ef60c26c25ea/dibos.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/34db04f9687b4356c4d552683254fc8b/74549362557.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3303a10e8---63723454114.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5ed36ac55---65423028525.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/90de40fc5d80f89061e29eb8f0250c64/97611144028.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b272e42f06bcb73e5b0cb49978428135/8400138509.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/xododagiwa.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/84893227972.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/sujenipajake.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f223a3f340---39312661126.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/75481780356.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/75163625434.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160898c14b52f6---sukudidezodejikem.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/josijixomu.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/8dsk74c5fnr4bro6u0bul6as78/28565764505.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/83657908748.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082342996d01---namor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=online+code+editor+for+c%2B%2BPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/99e5d705809f2d318307052a2dd7351e/manejotajoso.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_off00010d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D48 17368 bytes
SHA-256: b3bcaf839c6d9b81ee23fb1ca4348e00732fabd34ea4c08f535516b0cb2c9780
font_01_sfnt_off00013aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAB 10164 bytes
SHA-256: 7acbe1ef0a90bfa214f7f328dddc4d56374e9d4e3226f58cb4fde86ed8bdb426
font_02_sfnt_off00015183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15183 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1