Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda33b84cbe5f164…

MALICIOUS

PDF

81.4 KB Created: 2021-09-04 19:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6eb0837f2adcd633acf99a709fedda07 SHA-1: a0bc836436d47276e1c635f9b741bfa62be6f178 SHA-256: eda33b84cbe5f16468f4a5f835e225f83cdf2d03a5c236a86e36e82c03c8ff22
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are structured as link farms. Heuristics indicate these links are used to direct users to external resources, potentially for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://bulgankhangai.mn/userfiles/files/21067965416.pdf In PDF document text
    • http://orderkiwicafe.com/uploads/files/kimomunimi.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/pifomiwa.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/xidon.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/88922005984.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/26528471437.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/49714017784.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f527e2ee5d6---sibuxavitotetokugowaj.pdfIn PDF document text
    • https://alutat.com/data/file/xonekevekenatunosev.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160828edb2aff4---40255518973.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/4317f6706517134a298f79fa04997b69/98945125129.pdfIn PDF document text
    • http://physiotherapy-warwickshire.com/user_file/file/gunerapoziluberanedomej.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/99328281524.pdfIn PDF document text
    • http://namngonviet.com/user-/files/tisal.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d353c80f---jorutajipomanuwupis.pdfIn PDF document text
    • https://atrax.hr/files/bajigitonoben.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/larajewije.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608887b22c796---lopekizumidaxolod.pdfIn PDF document text
    • https://lhorizon.ca/uploadHorizon/file/55349922525.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/sabizasimometifapabawe.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e5f956ac149ce84e6da0e5b975b95087/tepokafapanalidepevize.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/welejadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=english+grammar+book+for+beginners+pdfPDF 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_off0000d1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A1 11060 bytes
SHA-256: 907069733685aa5d35c909b992926ee7c99c0dfa3e7e9f666c9af7299f73f852
font_01_sfnt_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 20376 bytes
SHA-256: aa0dc0d4930acdfdeb5f27d7af81bea6c0870fb96677402f7f13ea5fe036398b
font_02_sfnt_off00011f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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