Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb2011490b84266…

MALICIOUS

PDF

89.7 KB Created: 2021-08-06 16:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a6e2e580fecf2d191d8e2ec2ed19f265 SHA-1: 5527230867b1c1f3958703ebc23477b228046cd8 SHA-256: 4bb2011490b842663b35ecdc2de266d6ebd8fbe9b354c1003ab8eb4b6e3b5259
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://medvor.ru/uplcv?utm_term=hp+pavilion+14-ce3716nd+-+laptop+-+14+inch+review PDF link annotation
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/77d7b0733fb8802c2a4cd335e9cf5934/getit.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/a7fa205e30ffad7173c04c95fa4f7fac/farasevufilatodi.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/benukowok.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/e8bba8d9c6833ae1e35f31ec862b12d3/22351875952.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610316d5df9e7.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81a38d2ec4---redasizinaxuboro.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/22582805525.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/72511f8b2c2492510a51b283154f2ac4/latixiridasirepemewu.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/wusaperano.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5927000148.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/75397029318.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/30148087369.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/vinowidimenisofisikutik.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073f7e0a7254---mitaf.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae6ac9edb793a505a7fbd3a70cb9f035/pevuxi.pdfIn PDF document text
    • https://anaksemut.com/contents//files/siwejones.pdfIn PDF document text
    • http://jingchengs.com/jingchengs/ckfinder/files/20210801074556.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f2a2b0761---sitepeso.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/47443515035.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/93828571842.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/zotowexupam.pdfIn PDF document text
    • http://altinay-law.com/images/file/85514858584.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/mewotojulufokiluga.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/048232c8156bbaad1a5323246f4b5bd4/41860000234.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16071ac24c3312---82335116678.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/91889794737.pdfIn PDF document text
    • 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_off0000f8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E6 11140 bytes
SHA-256: b8fb6de7ab9cf2ffbc2ddd563ecc04556cfd03abbfb413c50473f17ee9ec685c
font_01_sfnt_off0001130b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1D 17460 bytes
SHA-256: 83317d6a3a37a8837e14e574795622402b8516027ac21c994dbf8be0e1fba497

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