Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f10cff0a2b7cd0a…

MALICIOUS

PDF

101.2 KB Created: 2021-07-23 08:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3525103117b152da02995a9f2662ec3b SHA-1: 19cee3410cbe42ee33304bdded35336c773788fe SHA-256: 1f10cff0a2b7cd0a7759088cb4ee8a5b2466db399be70f2cfb456eee7bee5ca2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are hosted on compromised WordPress sites and serve further PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure itself is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e47d5cce699---jadolu.pdf In PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//voberubizus.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/417e15a10488d7a2518b2c036472d7f9/debapetuvewo.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/baa109c107fe5aa556b1df3f9b79095d/zazibeved.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/708c5d37acc4b3efbf65134c6ef380d2/zosemigidadinotis.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/81119964393.pdfIn PDF document text
    • http://midel.me/userfiles/file/82391718772.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce8ae2d86b---rafid.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/favapabiset.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/7cdf7fbcf81ab6ffd138a88fea38d8fe/95263619543.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/761886625608bcdc294ee6.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/99301e8c66b3b9871bd62f8a9761ed96/10779560430.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/vppa3kh6gn1euvrko552lr40u3/4582148788.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/9055049f468907f76c24b0f1a812d94d/rowozevajakovesefitazop.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/20781101189.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f8aa5cb41a267121ce8a5a71462fada3/gitupeziduxu.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/fogomu.pdfIn PDF document text
    • http://cosyromania.com/media/file/bixeguxelog.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/faxosifivi.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/rijoxejobosinazaxutata.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3e15d3410---soduvazun.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/4feab9223e0d32b466d45770a60111c8/tomejuzizitafifo.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/fd112c8dc263194c2caf42c1717f360f/dazezagutibizevuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=all+music+notes+on+staffPDF 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_off00012670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12670 10476 bytes
SHA-256: c9846940a03ae35400307a2e4d58aaaac87197f9f461765e71ff535dd85e48ea
font_01_sfnt_off00013e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E40 18572 bytes
SHA-256: acbecf31abb858716f5c966c5006ead578948b1cab6115503287679f73ed3ee3
font_02_sfnt_off00016f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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