Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae6c8bbf3e96fd6…

MALICIOUS

PDF

83.0 KB Created: 2021-08-21 21:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6a02c8b0a3dda6a4c4fbb4b8be24112c SHA-1: 28bb96c967423fbc7c31390ae8440a1208b0143c SHA-256: 2ae6c8bbf3e96fd6a4ac2497531260000c9bda9bbc32294ba475e173f7a80fbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://avphunter.ro/ckfinder/userfiles/files/mevufereronevabibapo.pdf In PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851835567e3---24615729319.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/e4f069edd5d734b5e71c16f89eb2fc13/18868888449.pdfIn PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/78298176660.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b4392cd4e---pexixezufepadozeke.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/repabuxepogoxunomosinex.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/nccoi4nh8ul3kjmttkvg3738pq/29838521717.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/ede213c16b51a87e8f86e08a7ed72c33/gozizazukutopekovojesutur.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/a514699dbc599b316541f974898628d1/48103795178.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/vulupajoperavexawejusokep.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/9862eec317a7c36222f404bdf540795b/37275723695.pdfIn PDF document text
    • http://it-hair.com/userfiles/buwagin.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c42440426dc---xigonedexudibaribuzu.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/rawelozokowaf.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/xanisajine.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afb71e8933b---50694447252.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/xiwenukabaxomidege.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/46590364255.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/jaxefimibesinavevuji.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/83c6b527dba9bc289418512c53080a45/pabaxinipuvitizoriwerole.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160860023886f1---23795877865.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf3db3e0c0---3099296286.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/30236000862.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/fewomi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=introduccion+a+las+finanzas+de+alfonso+ortega+castro+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_off0000dc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 10904 bytes
SHA-256: e8ac485d1175c545e73cc9f5f448ba22db1266e30e0da0e2bb04ff78c31a3a60
font_01_sfnt_off0000f564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF564 18400 bytes
SHA-256: 096b69ebb75126e04cd1c945b5e9cd92471a76918c0a1c42816428086d718db3
font_02_sfnt_off00012435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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