Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1006e7e6264a6f…

MALICIOUS

PDF

80.5 KB Created: 2021-09-08 01:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 74c435cabfd9992f4d57ba58d265ecd3 SHA-1: ff2e524e590000ba8261e1893486c2be70c084c8 SHA-256: 6f1006e7e6264a6f16efbe3b6d0c27b471ebc875669f6ba700b771a404315c80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://haozuowenwang.com/imagefiles/file/bazozuzewuxipoma.pdf In PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607870a579b86---jenatekutorazujujuxatugi.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4ada6e0f9130585e7948ec4aeff388fc/wonugexusudikivegexaru.pdfIn PDF document text
    • http://soupworld.de/upload/file/tolatisamoxoxomatotaxu.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/ebc19f5a57bb878090dfcb7a81fd30a9/luzafidonoburavipola.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078205729dd2---62172045039.pdfIn PDF document text
    • http://benly-carson.com/product/files/febezirurawabo.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/vonafulesinadexu.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/84045981705.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/48441731006.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/bokexenaniduvo.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/1i7u6q5ahuo2eddtkb4sjq1ek6/22099775619.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/vosewavu.pdfIn PDF document text
    • http://e-hematologica.com/users//file/55873483944.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/25530558777.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094200384ce9---megekutujebenir.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/tilelenatarupibuka.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/24404036968.pdfIn PDF document text
    • http://medrea.ru/upload/files/pewagipujapexo.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cab8b900f66---xozovafosamurosozaval.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/36126491477.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cc33eab14---pozejuxuxutelenat.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/7a46d945ed81288922d6cfba3ce0f0d6/18981144511.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/91e7d90ff88fb8051af4834f8d374897/marenok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=dialisis+peritoneal+y+hemodialisis+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_off0000d49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49C 18224 bytes
SHA-256: 4c1c25e378fb330570e3478a9346b62e347959b132feeef1ffb31a36e0faae8e
font_01_sfnt_off0001038d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 10880 bytes
SHA-256: 2c56c2de497dd5cb5259da9f39219902577e7958cde7444cc675d009f7dd5dc3
font_02_sfnt_off00011c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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