Malicious PDF — malware analysis report

Static analysis result for SHA-256 0200c36c8402574d…

MALICIOUS

PDF

77.2 KB Created: 2021-09-07 18:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d3eaa51c8600165f62e3b63dbba3119a SHA-1: 106b8b7b1414fe0401aed796cf19a9435a38db83 SHA-256: 0200c36c8402574d71b9b4716677ca03e5d424c51e4a623bc6c73dfdf56e7da0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=maryland+driver%27s+manual+2018 PDF link annotation
    • https://alshamiltrading.com/alshamilfiles/file/35007733506.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/nedeleker.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/66887487681.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/renipanijados.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f0c467c29---54328044066.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c718e02a02---30523276274.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/aeb81da5859a3c35b33244c74ec50e78/33714188304.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160983157c75b9---lenepifasoz.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/46372174812.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/86058187158.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/83264952642.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/64149688990.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d5d2e44c---67217065332.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/vaxunatip.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/67725593775.pdfIn PDF document text
    • http://iworking.vn/uploads/files/vurevumiw.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/zepox.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/70flc798mv3mhdc8j5jd0mglj6/fafavegabesimilanobegorud.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/mokipebu.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e47df3a2788---fedirapoxanamopewibevabu.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/bidusukidazuzo.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name//files/zanumogez.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52ba5de822---83574085671.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/repele.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_off0000cc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC47 11000 bytes
SHA-256: 928744d1f1874ddec11e332abed5edfb7d767f715362ac95b937df27b7a2ffa6
font_01_sfnt_off0000e5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E7 15956 bytes
SHA-256: e8c7494b5272747f6c345f9177475aa692753f99133b7756a6f086cc8e79c4fc
font_02_sfnt_off00010f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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