Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad314a69829d30c…

MALICIOUS

PDF

90.5 KB Created: 2021-09-05 12:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4dc1741b340f379bde95e87e1bd567cc SHA-1: 632bd3f2d131a900c193767de9a1f262c89a2463 SHA-256: 8ad314a69829d30c5b6a75e0d4a592111a368b5b4aa1937a89087da4b6b25456
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=big+easy+oil+less+turkey+fryer+manual PDF link annotation
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/slv4mvgu30srhvg72gb2kthu74/dojawukatadapumuwexosezo.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f21b0dae7d9---tadivipuvubolosolifuxe.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16125e4fe643ed---pawiza.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/16134273816.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/wifir.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/nukakebo.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/66198353523.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/74523526925.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/91462853021.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/xanuxubijalaxijadam.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/rovabipud.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/lufazu.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/senopazinalusilazuze.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf262601d04---zupuzobonidudibelo.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16090b633c148c---94304370318.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/39213783452.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1289931b2---totizaderezaz.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb1b100efd---kusuvevun.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607e17a380a5f---28805037277.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/wukewuxuwim.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/69797923064.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0a1bc75217243eb269058556e9462bf0/pagiwuwalifurinatilewajef.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/90233244338.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_off0000fa75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 18536 bytes
SHA-256: 61344fc79f35db8447b7e01f3e415b1a9ed84aac08cc44b88d3adcb8e6bf7a9c
font_01_sfnt_off00012aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEA 10916 bytes
SHA-256: 7ce446c2b58515d583b45fa86123f55e3026b6ef9f97bd8e57fa73f8317af36d
font_02_sfnt_off00014446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14446 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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