Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e72e00b53a364a…

MALICIOUS

PDF

76.6 KB Created: 2021-09-06 15:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fea162fc4355c28cf530d08d2d6f59ce SHA-1: 08f09c4cecc5aeda7ac7145970184d1c37aa032e SHA-256: 17e72e00b53a364a9e06f4b62118e87f2e77f4e66ed35811364392cb376d6d26
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and a high number of links per host further supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://lapalettedesarts.fr/gestion/file/fozibizovotezoxunamezo.pdf In PDF document text
    • https://binarbaid.com/public_html/userfiles/file/jadebuvibol.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/1d3dfd0f04703ace7f1d4be9e1082d3d/wagewoxebexaxesixa.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/jevinibef.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/dotopuleburevupupav.pdfIn PDF document text
    • http://potlista.com/file/files/24066631519.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///wagujuboxefoxuligu.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/57312861772.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0338791b2---69069633905.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/pql325b7nlem25qg6u32fcv7mb/zozofoso.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/fuwenezinebebibuwejipi.pdfIn PDF document text
    • https://hgb.se/filer/file/88106461028.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/00455e844f2992386496b4d60d4dba02/55831906120.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/nuvugelemebatavuboterub.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/34fc3696b8deb052fee2ebd9274d9a22/16817141949.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819d5f9a1b2---ramagosusizezixejux.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/38a65b6ea5ab9b3613bdfb70407161fb/bumakatamiginowawovonu.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/590ee8f6d5b66efb05e5744713247b30/zobagi.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/39161239471.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/12863965371.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/41176749900.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/idcnma9m6dq95qj5r9l4r5a34d/lilazunujipalebewiti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=joshua+tree+national+park+maps+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f88f0f2524c---31981243107.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_off0000c844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC844 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE056 16860 bytes
SHA-256: 66fbabf7bd7acaf84cba952d0b62364bb2d99a49883881c07e5f9fd5862023f4
font_02_sfnt_off00010bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB9 10944 bytes
SHA-256: 4bbae92fe2906f8203265af7b221214cf18f880ff668a0e85be82e04f41136eb