Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb5365c7348ccc0…

MALICIOUS

PDF

84.0 KB Created: 2021-07-22 03:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0659aa1be823ab09639d7a8cd03aa832 SHA-1: 8a92c1e76fde1a65c26028488de22d339588069c SHA-256: 8eb5365c7348ccc0ac661ee439488b2b537ca56a7c85c101cc6e12b617094d36
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's part of a link farm hosted on compromised WordPress sites and potentially disposable domains. The presence of external URIs, including one pointing to a raw IP address, suggests an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85f6ec4538---xotogegadajomagu.pdf In PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2147f0c92---27770958136.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b63f8cccd05---nuxajirunagexu.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4665455c12---fawoxafegiririnimaruxiw.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085610fd1274---rafimonuv.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/xotukiludofabupewuf.pdfIn PDF document text
    • https://clinicscrm.com/img/files/zeduroladugi.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/titusasagagigom.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753e509066e---pebitunetunibuw.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088ff77d62f8---guvumi.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/madolipuzibup.pdfIn PDF document text
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/94239204556.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/lowiruvonegibad.pdfPDF link annotation
    • http://www.alexgis.com/siteuploads/editorimg/file/wekejewaliweker.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/k5eqief8vraj620on9v1anfper/burixoxezulaf.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0921b5ecfc---vememogorosogo.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/74836298529.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/ropafekakevegevepepene.pdfIn PDF document text
    • http://stepsforstarlight.ca/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/tevoponujikiduzupunugun.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site//site/data/files/mafuvodexiwebarenozotu.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/linapupijelumo.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfbab514f1f---35428371633.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/89418697747.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/tazajeduviwukogo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=taylor+swift+today+was+a+fairytale+chordsPDF 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_off0000e2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E4 16728 bytes
SHA-256: f13802f99ef821b2d14ed2cefab15ee1ddd0a541fa13a6f075a77fae1d78580e
font_01_sfnt_off00010e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A5 10632 bytes
SHA-256: dde46a7882b56fc5d15dc5ae623b3ca506bbec6dc7e5af84f1f574c6a2c7b72a

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