Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a862e4cb4ab073…

MALICIOUS

PDF

83.7 KB Created: 2021-08-17 04:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fb75860b99f334265cd984c706b356f0 SHA-1: 0c01a8d37897487a33ebed3b1e449353cf1a1184 SHA-256: 03a862e4cb4ab0733318463e8726493185eec4ef895088be7109ae9b34c4c454
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting domains, suggesting an attempt to redirect users to phishing sites or download further malware. The presence of external URI heuristics and link farm indicators reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/83ebfc453271a28264cc3ecc13fd618d/vugasemokefawakewudo.pdf In PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0c03f227---konoluvin.pdfIn PDF document text
    • http://baozhaopharm.com/upload/files/89072109607.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d62e22035---nolunevuropaz.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/15635008612.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/4191700192.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/e9c19259648aab0657a1a71fb16a0e86/wosuxesisedozuzodumojonuw.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/raxezuwumojipojewagopa.pdfIn PDF document text
    • http://bangkoksolarpower.com/syner_upload/images/files/951109987.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/losokexuwedikagavarofu.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/wawurolidoraninanan.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/345dab9f478e872dcc34aed72ede59b3/rirokobabumerek.pdfIn PDF document text
    • http://lamdecal.com/Images_upload/files/49341441087.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/demekenawigovalopumazi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a578bd97cc---40568089168.pdfIn PDF document text
    • http://grandfiltr.com/files/file/95998759060.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/07/file/48584928848.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68908389353.pdfIn PDF document text
    • http://bociany.sk/media/file/tilopofuz.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/vodulumewibesegimoxilabur.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a45ba0d50b1---95493750755.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/5b22721e4db07f4bfb2868ec32af6721/fegedokemilomageliliso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=cuales+son+los+sintomas+de+un+cancer+al+estomagoPDF 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_off0000e18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 10844 bytes
SHA-256: ea3bdad929794076e771b50062ec3cc39a81691692af4674fc84663e00f41de8
font_01_sfnt_off0000fa5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11270 17276 bytes
SHA-256: 715032423c3530665b47afbb8267536ed716788004f51e8f7341b8b24daf8893

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