Malicious PDF — malware analysis report

Static analysis result for SHA-256 2946aaf60c45af41…

MALICIOUS

PDF

138.5 KB Created: 2021-07-27 05:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 460c56d17a9221eddc9eeae2f3981a51 SHA-1: 7276227d08eeb45f8fd70d580e82843b66d51ecf SHA-256: 2946aaf60c45af415d42d235c15408301c1b50229ee7341ab5eabcd3b07f3a40
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure users to malicious content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a583fe75588---jivira.pdf In PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/6ac9a4a83d774ca167e4e5f7762d36b1/gidolutuneloxaw.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/67600297461.pdfIn PDF document text
    • https://mavibusiness.it/file/85461985489.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/wejulanevi.pdfIn PDF document text
    • https://marosme.ro/hirek/file/71203107562.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210612_4BEF22D6BA30657E.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf044f07378---23046618119.pdfIn PDF document text
    • http://www.toptehnik.si/images/39896204523.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/xirulusudugedixewitu.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/xubapifokax.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace6c2bdc7b---98324201924.pdfIn PDF document text
    • http://alumnicollegedelunion.org/clients/76066/File/8953343837.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/lafategedufoporoxibok.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/71125981511.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/bf80b73f9fb5a8e9ae41fb83debb69f2/murizu.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210625_042815.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/mofijogumototuwumoruw.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/705713547.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/4c5004d9387fde7181aba4f4d9a60d2d/59948768538.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=rentabilit%C3%A9+%C3%A9conomique+et+financi%C3%A8re+cours+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_off0001b5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5DB 11524 bytes
SHA-256: 02e48378d9c119cf6eebc775ed4e0b7c944e9cd4075b80721394cbb5e4bc1bec
font_01_sfnt_off0001d00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D00E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E820 19936 bytes
SHA-256: c07295a196712548af073b96216d6e2f9b5877a55d19c397129c7fbbf294ab8a