Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f7ba83d2a92ca1…

MALICIOUS

PDF

100.5 KB Created: 2021-06-28 23:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 68f20ae196ec0157106b1deaca8cee85 SHA-1: 48423e76a2d0825240ad386e1eafb5c03d28cd5e SHA-256: 67f7ba83d2a92ca19b83a5b54c7aa4a613420145a836412060df1ce91bb883e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079259a899b4---mopejotovabanalego.pdf In PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad65725c23b---rudenerunavowumipeba.pdfIn PDF document text
    • http://zuche0551.com/upload/file/revul.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160910349afffa---wikamat.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16099a49d9ea1f---50562314229.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/97577868120.pdfIn PDF document text
    • https://capecoralliving.com/media/file/33213043633.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/nefefege.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c9f158b88---sivixamododutekolona.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/98912182541.pdfIn PDF document text
    • http://charontrade.hu/data/file/damuvisivel.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/ca72377984ad945ee09ccde226804242/25214344321.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607eab609fad5---nudinotumagiliwerilomapoj.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/10cf62b41a293bb4f7d3a372744fb1a9/zuzewigopukugejif.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/8ghjhja4lu345qnn757jjts7dq/57799101103.pdfIn PDF document text
    • https://eslms.com/userfiles/file/kebunenitezezijekafogoxu.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/cab1f68218cf03b1d44d389c5f5dd52a/22735878070.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/46586856430.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160baa9f52d3d1---lifugi.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816df1cdda4---65968961171.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/75690481221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=average+click+through+rate+email+marketingPDF link annotation
    • http://janyska.home.pl/_mjanyska2013/fotki/file/revuwob.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_off000125dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DC 10748 bytes
SHA-256: 1f3a6f44b5d14b9c17e921a2f6f9e99ed9b95b7cf73b81d8cac9f6ebd53dc2f9
font_01_sfnt_off00013e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15683 17592 bytes
SHA-256: 410623bd2e2f05f7b15e3cb26b29ad945da2143aeca14ab382571908cecde0ba

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