Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3220c0776e4c709…

MALICIOUS

PDF

117.2 KB Created: 2021-07-02 07:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e3494a61f7c6812fb6f0d16540261c2e SHA-1: 6fb63859b5d97e7a702b37366ea0b4ed92577ad4 SHA-256: a3220c0776e4c709c735111260d5cb5bf149e44311c101e39ac3a9ddf4cecb9e
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress uploads and disposable domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The file's structure and embedded links suggest it is designed to lure users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/vilivetijasawurarujizab.pdf In PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608947e456172---75670826791.pdfIn PDF document text
    • http://gphs100.com/clients/e/e3/e3ed30f4e85b1ff1e74f61348c82e8eb/File/xikufumozufafisis.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/48591748567.pdfIn PDF document text
    • https://blokhol.com/upload/files/jozodekarixi.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/juperewuzunofepurez.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/xaxaj.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/9jibs6fihpq79hdstufqh76v34/25780508950.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/e8b7144190c08d3ef05fc346beb0559a/wavirutonomaraduv.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202106/file/1623015431.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/c3ce3267bc1923f6ed3cddc3ad5a5aae/ropuwapumepomeli.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160718a34a310f---jenubapirugosegeluvan.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/0b6e8cf2d7ae3227a80a357e55625f2c/19397263733.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/60768006840.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46824156722.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609eaa94843b4---82950399521.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/rovusezuwawovusumuxexuf.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/37071ff8077739259a5d5f9190c80930/garobubokemalagapezewu.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094e58c5ae4a---karetixosow.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/67967401117.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/wesevexedonikatelagexo.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bced2937e72---walam.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/db8897a2111e1041e1d8ea53ad5c128d/lufivefezasoden.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=rhombus+shape+in+real+lifePDF 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_off00016972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18184 17256 bytes
SHA-256: 26d3ded48dad1580caccf915678e35bbe3b0b74c04c3e189bb53915781710b89
font_02_sfnt_off0001aeca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AECA 10808 bytes
SHA-256: dddf99bf72ea8d61c592b350009e4450b7a2e7c352e0e64b1e0a98f79504952d

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