Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2d58d76800d81a…

MALICIOUS

PDF

85.5 KB Created: 2021-08-25 22:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c6001e4068ee331cd1819c4f842b14b5 SHA-1: 0268e35f5a8e89cecb35455b53d3cd3e771df87b SHA-256: fe2d58d76800d81ac337c67e526204ba8b41db3bb52db4005bce45d21e4f925a
196 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links to potentially compromised websites and disposable hosting, characteristic of a link farm used to distribute malicious content or phish for credentials. The presence of 'cmd' tokens in the document text further suggests an attempt to execute commands or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://urbanconstructions.org/images/uploadedimages/file/pepugesexelaravapanuvi.pdf In PDF document text
    • http://saxons99.com/clients/5/5f/5faa49e4155ddd0d4faf97b0d7aa3dde/File/rerezokipisiv.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/02k3kca4fn7bdnro10k7jcmd5u/riwogoluxamigozo.pdfIn PDF document text
    • http://bienbao.org/uploads/files/lijevataveliminusamiri.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0555b4a2b8---25698008892.pdfIn macro / runtime command snippet
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c95aace9e62---pezakot.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/54503343984.pdfIn PDF document text
    • http://sobsai.com/ckfinder/userfiles/files/90410571232.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b153c8a9ccc---14002238557.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8e60d5d61---67436886350.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/bso7dp0uq6h2otd8fiqe7m8u71/bovawafesezopobeb.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b620f0e9eb---21216472781.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/7401145545.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/i2msrscuemj825qj5ghm8tta0n/wosusopo.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/46389565428.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/lusogipefuze.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074d03753b49---27336975041.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70349874008.pdfIn PDF document text
    • https://tempegaring.com/contents//files/53541642156.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/51667512934.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/cb8940m60egnuvtp6nibkjoj21/wofojekamebi.pdfIn PDF document text
    • https://csn-alliance.com/data/files/25507378492.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/90d7eb5c63e7e329e23b54db294172d3/69761143106.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/6b75b24f67bdc67b36adf5185a699581/37411182222.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/5184093980.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/49hjr8iqkc8539tde211s953as/80568690076.pdfIn PDF document text
    • http://bienbao.org/uploads/files/In macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=equation+of+plane+containing+a+line+and+a+pointPDF 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_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 10756 bytes
SHA-256: d2c449d1cdc26cb4f4a003faf535dd5132a8253618270d52b9eea43c6a0ce197
font_01_sfnt_off0001020e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 17320 bytes
SHA-256: 12da4a5cc196adf320dc06499493c09308f402b7b41b49e51e0304c5bfceae54
font_02_sfnt_off00012fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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