Malicious PDF — malware analysis report

Static analysis result for SHA-256 feed6cce1fa515f6…

MALICIOUS

PDF

85.8 KB Created: 2021-09-22 16:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 55d59577c864103a39e2ba6a34cab42a SHA-1: 66532f663399e044acd7b97c4bb48324413e6614 SHA-256: feed6cce1fa515f6e1e67541bca1eae9bdd0ce225a159951c18048ab0df96e4b
204 Risk Score

Malware Insights

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

This PDF file exhibits multiple indicators of malicious activity, including links to compromised CMS uploads and a link farm on disposable hosting, suggesting an attempt to distribute malware. The presence of a visual download button further supports a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it is designed to exploit vulnerabilities or trick users into downloading malicious payloads, aligning with common phishing and malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lanegarrett.net/userfiles/file/sumis.pdf In PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161333d3da6c9e---guzadobunukinuvosoxovejud.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/pamepesikemoxip.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/94676732898.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/kevozefok.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/kuzuzowavavebelekip.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/67364947099.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/12986333076.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/95205798294.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/jogazusoxinupedotugew.pdfIn PDF document text
    • https://amgaa.org/temp/files/zimonobagujijejavuxuw.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/52498481795.pdfIn PDF document text
    • http://coytex.net/ckfinder/userfiles/files/towupetavojupizo.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614af74887d1d---xavebuk.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/tamiredu.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/95461077883.pdfIn PDF document text
    • https://koratspring.com/upload/file/33619206203.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/qme6pk5phucq576frja7qk1535/sexofofarapagapubikej.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/6e6f8d6724f35965cb3525658cd4593c/didosul.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/91297820951.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/90703178796.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8aeeaa07f---2109585080.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161471144679d9---12298958059.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=inshot+premium+apk+free+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_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 19152 bytes
SHA-256: fee9d9603e04f821dbc22ac23698c6dc2ee7a4577529a9d59eaa9b8a3b74fd02
font_01_sfnt_off0001181c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 10992 bytes
SHA-256: 20512cc65b96f56a988de666ace67f5e4c5a87ba29361d72065e9848d9f1af99
font_02_sfnt_off0001317b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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