Malicious PDF — malware analysis report

Static analysis result for SHA-256 4067640b657de764…

MALICIOUS

PDF

92.6 KB Created: 2021-06-28 05:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cce67dcc6457d6166bd02c04539e5be8 SHA-1: 71818a5767909a59406c1d2c0dbdfb18b027bfdc SHA-256: 4067640b657de7649b6b93223a050fffa37fc7fc7bf48ce8f16f69e85abea148
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. The presence of numerous links on potentially malicious domains suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/e2bcb1626155c6a92093eb9ac82ff5a0/mujenatifewaleki.pdf In PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/96tm1iesk4c4cr5lr685e81vu7/63497515240.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4a745c781---vugodukulifejexisunet.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/a5e3ed54f90d102f90df5610a3e126af/69070542481.pdfIn PDF document text
    • http://bangtaisay.com/uploads/userfiles/file/80523074211.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/kosuwed.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/a6edf2f7e1fe54cfc1c91c1d2d92c72f/tenevoranefatedogovotomoz.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/8ec84c5b11fea19f7ade3483692d147f/36165769856.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/suxuzupaliset.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/l5r80mdl1bmjnu7enj529mueuv/zomawagil.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607924053b3d7---dabobaxuwekorozabeb.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/cm4bpdt6subtm28vlnr65ddtb7/ranadojelonoxuvitog.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/xulob.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b381a721188---4951109705.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/luwukavizufanawa.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///98303431741.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/55f12bb3c8e9da815494a3677e82ea41/24955314555.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968e27a29ab---puxazojonesuluzisew.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ds2adjrn17cin3lhuick587ni4/60765197116.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/15153851159.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/jawugito.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/684ef8a316133bbc27dbdf2614e530bd/18121662130.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa2a23cb93---dudinemejoseminaniko.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/7ojovam0lbe480d63nspam7vlb/widiziwurugadi.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160877f6e2ebdb---niporil.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/vexuxoxusalabewuzefurinu.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a014f33e739---27423058664.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=golden+west+college+counselingPDF 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_off00010978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10978 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001218f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218F 10508 bytes
SHA-256: a007e8af0ab4aeb248eafd777b0802058844f6738d9ba7b840aa49c4446e2e04
font_02_sfnt_off00013975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13975 16724 bytes
SHA-256: d578776b4110e5c1c2779b04912638f452da965350ecb488a39d815e63c01f9a

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