Malicious PDF — malware analysis report

Static analysis result for SHA-256 a448b0ee12b8e91a…

MALICIOUS

PDF

86.8 KB Created: 2021-09-01 23:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0341f4faaa08e02a65d4b671245bcb2d SHA-1: d4535d6c8aaefc00e169ed4622a029be08cb9004 SHA-256: a448b0ee12b8e91afa08359b32d5e2d99a2cb51c2ebb7053c683739a6979a803
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://art-gallery.mn/uploads/files/20120572854.pdf In PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/xukedaxole.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210630_3DA09BA2C4CED3DB.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f712b85716f---fezeselikozumajekejivana.pdfIn PDF document text
    • http://thomasbelldescendants.com/clients/40432/File/2298389653.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823ed157115---3013432122.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e783ab17258---kodoxoramapakekipiredi.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/12299725508.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/39372795026ac9c3fd8ba65e565bab7c/vujagiwojaniwinu.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/34105671042.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/88851329661.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c275d47fa88---54210367457.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/pidobuzitipoxikup.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f891689a7a---gulexapupi.pdfIn PDF document text
    • http://runningrhinelanderrabbitry.com/clients/875187/File/5698173662.pdfIn PDF document text
    • https://e-room.co/userfiles/file/wazuf.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/30cab193edaf3ffae836372261dede84/91424244916.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/bc1cc4f249eaca180ad50597907152db/96776550131.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/xebimegalin.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/voxibijawabubejokirakur.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/20390299142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=cape+horn+trawler+for+salePDF 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_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001053d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053D 18732 bytes
SHA-256: 44c26afdc0998ef4d6bc18c1565c4f4c2e7a98cddcebca387339e104439ef4c5
font_02_sfnt_off0001363d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363D 10480 bytes
SHA-256: 0b959a408c7f48c7c0fae89906a7a06d15211b0aceac5c27cc04431d96247157