Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67fa3ea34b8006e…

MALICIOUS

PDF

83.9 KB Created: 2021-07-08 03:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1d4a3df159d0cebec294d623888e58be SHA-1: 8f1c25278ad475a541030ea8884d6398e6e9a924 SHA-256: f67fa3ea34b8006efb7d9070fa14c1d21e897b1a7110ddab6e5d0979c789fb76
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL analysis strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ffd85a2ca---xizubibabevebuwuxoxon.pdf In PDF document text
    • http://appletechsolutions.com/userfiles/file/wexatuvopenavuzo.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/38027358243.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/64739362652.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/15610733087.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8428be892---fosezinowiwagutomo.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/067a04862d170bf5d9a9e58e85115d6c/52117379782.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/76970194741.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/cbf604004504cc96c7039fac021141ff/roxudigisiwapero.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/a34ggf3jljut3uc1rto5do62se/12776026305.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/30212311765.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/danelixezog.pdfIn PDF document text
    • http://masonfamilyreunion.org/clients/b/bd/bdaf0a3c19eb5f10f0519c747c117e37/File/36945819293.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b6da11eb6---kemosukuvikopufejirotek.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/vigagibomenamezet.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8f21bf520---95938802820.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/gatagimo.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f7d91b93c---geduxokefepovej.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/7ff4970108f7078788dcba2dba0ae956/pezadinavapekidano.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160adc845312e2---34980104050.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/40c7260d0624e0b6cb6ded23e30ecfeb/86557748754.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/plkkup4m77bo94aiiqe7peuoa8/93566560525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=cell+cookie+projectPDF 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_off0000e66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 10184 bytes
SHA-256: ceb3743c8eeaa81b633e74e9c3e4b81ae6d96a4f3b5cbacf459bb2d51f74df62
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11564 17312 bytes
SHA-256: bd0fda77f5363141ef4b1bb7e8e115684632d4c084658d74b6ae44b0133085ca

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