Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cedec0ba88de64e…

MALICIOUS

PDF

74.8 KB Created: 2021-09-08 04:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3aedd579a96b220b68421b61efca7e0d SHA-1: 743cefa63b99aa28c42bfead93bb88b647d414be SHA-256: 0cedec0ba88de64eee1b586e9a550df2d2ac21e2da2111e28e0a4c93ba57e57c
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm patterns, directing users to compromised CMS uploads and disposable hosting. ClamAV and ML classifiers confirm its malicious nature, flagging it as a phishing trojan. The embedded URLs suggest a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://drafthe.ru/uplcv?utm_term=holy+bible+in+gujarati+pdf PDF link annotation
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/1413341a80cf4b98279aa3c73c50f50e/zajedelisimisiremuferive.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/finoxasudadobegarapote.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/k7clf4f9ncn05bflekk4h9mlg2/sutudosupupuzojixa.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aca1573a5e8---lipiruwogepebux.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/robezi.pdfIn PDF document text
    • http://burchiellati.com./file_fck/file/99097743622.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6b97d2e95---xinivejuludifelarimenonuf.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ef1fgk1b2c2qe5ktlm8hf7lkb2/vupixubugeju.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/tatemasozumenej.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/21851589567.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/wukoduvagazibedurawul.pdfIn PDF document text
    • http://podushka.by/files/files/timipufifak.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/mikegilimowag.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/sexodep.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097e8854333f---mivivudazefunexu.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3070b14c83---gelelovobovore.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/vibafenemejepo.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/vejuzimewo.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/54929476081.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6fafb2257---gobubaxoxavodujoronidani.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/zakuwetilipone.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/qvac7o9qur6pbvihmthp9qe8p5/44912845886.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/zetuzegewiluxa.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/16jegndn112gl6ujrib6b8pld3/bomalofatiwirenaz.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/269e832a486d16b6a4c238cc03fec83c/77794588763.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_off0000bc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC08 10980 bytes
SHA-256: defa188c7cfad533501afede0fd2809f9fc8ba75801e9f9a87682850eced037e
font_01_sfnt_off0000d525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD525 18608 bytes
SHA-256: d01342ca2c0288a4f72df55d2b82332f4ef2b2d7d139a1f52ed472a355d039f5
font_02_sfnt_off00010546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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