Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1b770c14b783bc…

MALICIOUS

PDF

85.5 KB Created: 2021-06-30 18:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d71a98e52e3f3e3d724514e9d0fac080 SHA-1: 76479f6afcd4e668fcb973c65cc6b2554a4cba09 SHA-256: de1b770c14b783bc2365464293676aa8d48b4e64094fc62eb84c44c4a20770c7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://hostingalani.com/calisma2/files/uploads/5690434263.pdf In PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/e8de3919d96dfc446546deb265118f79/42011722457.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160799f4758c8d---beletupiwevedatamesefosi.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/pajufotowovuvalaxutene.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/a9f0129244f48c2226cec711889ca72f/24760319541.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0127f21196---redowam.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/doviwigewa.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/50516016890.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c883696840---mogediwigiki.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3919c10e45---55102972260.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd35996548---mifoxaxe.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/8477984847.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/mafuzusorober.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab9e249427---xaxarivomudufikofuf.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17692dca5f---texizidoko.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/lowetimejegopasemar.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/dipimor.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/8442312950.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/fupafamo.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f7f807779022d1a251f760ec727bc1bc/50040756419.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/2ec770761fce2e5ff7efda36e39b88c3/92392519791.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607140c0b6a80---potiko.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/1df87fc30517fdb0b75776a3fce7b162/59661235890.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9a2d2c938---remogizexebaje.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/175774c1e8d90279111df3ab5641c08c/fofasezutedede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=treatment+for+a+torn+tendonPDF 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_off0000efbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 10172 bytes
SHA-256: 501324cbbedccd2510e9328037e11b306543158bab4df03a7737294bf5dd5364
font_01_sfnt_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 16300 bytes
SHA-256: aaa40a36183fd7c1f467bc87c7c562409c8c2321a8da9c39fc2a695f317bf280
font_02_sfnt_off0001307d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1