Malicious PDF — malware analysis report

Static analysis result for SHA-256 feae26da69b3895d…

MALICIOUS

PDF

86.8 KB Created: 2021-09-04 12:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0da87dade25957b8361be76e0b6dcfbe SHA-1: 9062ea9aebde097d7b213aa0569c47978f0f9d6a SHA-256: feae26da69b3895dd473150e3794aba5882160eb8e8242c90a7cad745b5d7f97
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/anen9hdvj4k0qi76ftaapjt9i5/51010311429.pdf In PDF document text
    • https://arch.ua/ckfinder/userfiles/files/lagetusesuduzom.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/nimimokoxo.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/8efbe23f3f23e323ca97fbbe2aefd9ca/48069360464.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/64fff52785f40547719637ab727846bb/23113232459.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/33534351258.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a6a105d4c---50840888426.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cd1e8c584---bokolozutatuviduga.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/lenasitepukixe.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/63256203908.pdfIn PDF document text
    • http://mav-auto.ru/images/file/12196210007.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8c11071628484d463f045b4203fe2a3b/60668067976.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836ade85b67---dazigonasusezexomewori.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161051d7f8d6ca---poduwoduzidagukiverulom.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/796d5f6cc0ef139748b1b6e2bbb57041/tebokiwubaxo.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/6h14pdimf85b6nisunignp7tsf/kemetulukezitedejekijez.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/javagekanokugamujare.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5p50clkkq2fmqqf309t8vf99t0/60327524537.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/2r2ot5vmau2hlk6rgtdv9br4su/11102810693.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607106a76159e---nesafokisoged.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/zirinudosimaziguzerobelus.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/62708891096.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7919257620.pdfIn PDF document text
    • https://begili.com/uploads/image/files/gozimiwu.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/612mrsvv1mvcsktg27cd732gc7/gagovasesejukebide.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/b8d5119b5e0967e2b27fd037efef3f4b/sofafuvupul.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/luzemolasapisakavesexopuw.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/fiduterudiwojerogelidupi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=toastmasters+advanced+manual+humorously+speaking+pdfPDF 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_off0000eaa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA4 11400 bytes
SHA-256: 9f95c186a235fd22b09dd29185efad0d92858c27e091d0eca8491cab3d763fff
font_01_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 18564 bytes
SHA-256: 6ec0701b2d92df5b4d0feb83b36652c3bffa4504eaf216c2a08c4eccf658cd96
font_02_sfnt_off00013505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.