Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece97bc1d82f2e13…

MALICIOUS

PDF

72.2 KB Created: 2021-09-29 06:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5746d8ca9789c136ca81d8c0f6a70965 SHA-1: 5bae7225d2dd64efeaf48311eb5f3af93e4d5698 SHA-256: ece97bc1d82f2e13af81b356867895f47ea8e3e3ce2a4015d8941016baab68a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The heuristics indicate it functions as a link farm, directing users to compromised CMS uploads and disposable hosting. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://penzion-pod-rozhlednou.cz/img/file/pobinobudi.pdf In PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/kavuxopuwowiverebavo.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/wufiroxom.pdfIn PDF document text
    • http://bubb.cn/up_file/file/xisigikifapafakarid.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/vezexidopegatuxe.pdfIn PDF document text
    • http://wdnederland.nl/file/13157261457.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/rojepopujagesuta.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/21095974465.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/dutamerew.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/0ed20c1d05d8e48be6b1239a06caccda/59369935213.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ebafnc7cejpr3ivfo025ghnshc/tojofulu.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/debelivitivalapokojak.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161402be5182c0---39023197129.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614b42076cffd---6605663868.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/gaxusebukowuzigaribusepad.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/9999303024.pdfIn PDF document text
    • https://artbynela.com/uploads/file/kuzubejizonovosumuz.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/54567060294.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/51601948731.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/91185094194.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/rukukeriloweri.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/pomudizawiz.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/36012720945.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/filikavaxuvaza.pdfIn PDF document text
    • http://bud-med.eu/userfiles/file/dojusalomavidugamobeb.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/19o04cfcfgchhsqmkq2ag5vnfr/wazaduxuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=android+5.1+1+lollipop+rom+downloadPDF 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_off0000b2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FF 18520 bytes
SHA-256: f34eaaa2a5d0b5042ff9504de020a5e98c7f77bf8c824e20a240cc5acea41822
font_01_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 10476 bytes
SHA-256: 28383666dee121952f5d426a5210e0a1f4bd22c7c5ef96197e64220945a573f9
font_02_sfnt_off0000fb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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