Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4cabacaa14c185…

MALICIOUS

PDF

83.6 KB Created: 2021-09-08 09:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dc4cb3b29f8a84066885b08020a780a1 SHA-1: 6753c15f114fd46022d2bbd7c79277b5bcc0f816 SHA-256: 3e4cabacaa14c185af4992ca34ca0de004fc8b41b6697529198588bce6d618c7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded URLs are consistent with a campaign to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://motodubai.com/uploaded_images/files/30739098883.pdf In PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/ms9ouhdtjm08l3j5jm6hnqs58d/moburixufidazo.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210803_849FA7941BD54D5D.pdfIn PDF document text
    • http://magicdiscoradio.hu/userfiles/file/lifenagewinabesadupak.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210815143639.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/ronuzopogarikowebofo.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/befe7ad541c57ee761618987f8631f65/16088957457.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106355dbcb3f---wopevegobu.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16211564944113.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/tuzunedaja.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9b2ccb0e9---toketerora.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/71125320891.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/52292721999.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/89443768468.pdfIn PDF document text
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/94197444729.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/24748852916.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/mavoxinevominabelesen.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/garavurulafupugufenovuna.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/jokerob.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c887abc131c---73553027035.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ac67003422e---44008808327.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c845d7404a37834269497073b9f5599b/31247246435.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/35868181685.pdfIn PDF document text
    • https://digiconelectronics.com/media/jasetuzibagifigozozilotu.pdfIn PDF document text
    • http://raczcsalad.hu/files/84800341002.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/89185871149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=las+primicias+en+la+biblia+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_off0000e000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE000 19168 bytes
SHA-256: 1b0ef6af7bb95807a1ed4d20750e44ca2d09fcfae5b895e6a5350cc6ff8c4498
font_01_sfnt_off0001107e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107E 10660 bytes
SHA-256: 9b03dd2d4b5ca31c92d68f8e66ae1491d9e82d0f37173c6a85b0cf9fec37cf2c
font_02_sfnt_off00012899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12899 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1