Malicious PDF — malware analysis report

Static analysis result for SHA-256 26605a54037bd001…

MALICIOUS

PDF

83.2 KB Created: 2021-08-18 02:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b6d277e481e5c792b4002c10e90a9a2d SHA-1: a3e12453078f6a4f2ea4b6fed8e4279a17039e2c SHA-256: 26605a54037bd001802dd4de08acbe8a07952a72c51b5c3ab19ce5e77992fbbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains numerous embedded URLs pointing to compromised websites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics confirms the nature of the links as a link farm designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://philabc.ru/uplcv?utm_term=how+to+disable+child+lock+on+panasonic+microwave PDF link annotation
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/530e2e9147ffbbf57eb66f86a12d61bf/kitigaradob.pdfIn PDF document text
    • http://tianfonmm.com/d/files/74804491344.pdfIn PDF document text
    • http://airfa.it/userfiles/file/87155427149.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f65c3c665ed---jiniditatukobofu.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b63ed614343---garijokarexemabala.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/sevun.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160afffc7a8097---guromuji.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/860ea99376fce202b92dd8b26f70364a/forijanirixutoxomokukubew.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/sedule.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1b975326b---29855604118.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/japuzovalol.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/lopopobudupipebirigewa.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/fomepogukokekep.pdfIn PDF document text
    • http://phillipsbricksalumni.com/clients/56168/File/86145039759.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/31454777753.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/ledope.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/39082edd03456333159405c851d950db/tizawezanurexopu.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609680aaaae75---77142566606.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/12561605799.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f4c45a4da---54439413021.pdfIn PDF document text
    • http://portableandcool.com/files/files/wajapelonekowekibanabis.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/55629127030.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/agf3dm0mr9mtocll5mlgbkdin7/gulefibokisavesidakodaziw.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16072f2870498e---89489931886.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/9c4fd082f7e813e9fb31f86939f8e13c/94334414788.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_off0000e0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 11152 bytes
SHA-256: 594b637a03877ee33a205ffef70de0c8cf61f4f5f72b26406c82fb2ffb51709b
font_02_sfnt_off00011285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11285 16976 bytes
SHA-256: adc64163af69b3d60d2be3962cbdd039ad5ce5e9616148dd13f593b01b9d6cd7

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