Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6daf8b35ed1754…

MALICIOUS

PDF

79.2 KB Created: 2021-09-07 21:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4483d156f9704fd99fc16ba81c850dba SHA-1: 9c13b306f4afc9fc2eadbff52d252fbecf96c94f SHA-256: fe6daf8b35ed1754323501bd336f72ed839604e19db2c1a1dd7d424b8f2dd1e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to host or redirect to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with techniques used to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7d6da9a7db7bff5a9ad4d2bad9401f2a/49187904622.pdf In PDF document text
    • https://augsburger-dartliga.de/uploads/file/70447698124.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608337160f1fb---lutoguf.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/59c5e2ee415162267c9ec98d06a494f7/76033311207.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/depuxifotaxasujulepodol.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087f311b6f9f---48152817358.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/62453a0bfb206f0566aee4634bf5d210/vetumajakuburagusifo.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b9ebe7646---gejowokazakoxo.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/758b18f58cb944cc745d4824b8bc0e2b/wupuxone.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/1a75e5b96628331cac7bee9efad2c12e/tumifina.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/ripejomili.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/kerufikinepelidowesaka.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021060310231780554.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072799740870---gubutazokanola.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/fawikezaxataluzafa.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/51891127643.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/munagimomeze.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/redijem.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/68136238029.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/49752959792.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/pl24fgutn7v6cr4qmvprqvihb3/zonubivagiwi.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/vokifijivoxepaxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=factores+de+riesgo+para+cancer+de+tiroides+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_off0000ce91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE91 10728 bytes
SHA-256: 2510e347eaf5824abd94a4fc34a66d75f1f8d754a761760ff84b1041f1f62b3d
font_01_sfnt_off0000e71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71E 18672 bytes
SHA-256: 687189662feb0d83f14852c1aa59e4cb43e2966a18c24b8df67b0664b511c994
font_02_sfnt_off000116ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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