Malicious PDF — malware analysis report

Static analysis result for SHA-256 c067fae401a5b75d…

MALICIOUS

PDF

98.2 KB Created: 2021-08-07 06:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: da98967e0c9dd544819c69459d893dc8 SHA-1: 9b390abe021a6ff59cb3c984288fdf17c744c77f SHA-256: c067fae401a5b75d31564c8b0405e6785072b27ce7b91ccb38782cb6821e7e8b
196 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains a 'Remote-support tool lure' heuristic, indicating it likely instructs the user to install such software. The embedded URLs and link farm heuristics suggest it is part of a phishing or scam campaign. No scripts were extracted, but the PDF structure itself likely facilitates the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://store-connector.com/_upload_bilder/_filemanager/file/15888665722.pdf In PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b3eb7c98b---nusenalijojibad.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083042303806---5826687926.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/35712150794.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/66549495898.pdfIn PDF document text
    • https://gilbertems.com/videos/file/59607560451.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/69873047340.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/fexawikeradele.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608422270ef39---25397719374.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/8ad00eab326d845bbba4522e0d026bbd/38695572174.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16085d2af967ca---zalegelekaxazur.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/90722755323.pdfIn PDF document text
    • http://asvpp.fr/pdf/44603398282.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/31324664532.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/xifovadafog.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab772e82191---48916992226.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/voxafagegupujas.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bf6b97941---96925594434.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/xonulutoriviwe.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/49635864085.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f2110b3fda68499b9e9ecc072cbcbbdd/106817838.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4an50op7fhl8i40afsfjpl8p5a/63072573965.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=como+activar+licencia+de+autocad+2014PDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de123b91b3a---mujopeporemadilumunu.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_off000118e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E1 18232 bytes
SHA-256: f463872a8d515b86d5d9a9dcc14c4f282dd4bad89ec328aa3e00e9a1265b15cf
font_01_sfnt_off000147cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE6 10932 bytes
SHA-256: 5fcfcd0b761ee62f5d8f88546fd04d1e5dc0aa3d1ebb187757e04dfff7af35ca

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