Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f08718d60949af…

MALICIOUS

PDF

72.4 KB Created: 2021-09-06 11:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2621df850bd9481abbb6074ed53a0fe4 SHA-1: d630379ea3c5541c9e1b2272ee8c7f6db59b1f69 SHA-256: a7f08718d60949af128276b0208845d1b6de440e2e3f9ddcec75d59bbdd45573
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and the presence of external links are consistent with a phishing lure designed to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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 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.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/sfs40358e64pgoe7ojivtg4uk6/60539463426.pdf In PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/rikar.pdfIn PDF document text
    • http://kaies.net/upfiles/210730011347711800iv2oxr.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/tewakufina.pdfIn PDF document text
    • http://michellesmithscott.com/clients/36670/File/zasevogosolugusav.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/cj1s98trq8glk0pgo1gmclfdae/82049292222.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/ketinojuvokapowapo.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/mogebis.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1d8c8e8ea---38389281632.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/wutena.pdfIn PDF document text
    • http://wirheiraten.de/images/file/pisepulazexinepebike.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/16940040867.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/rilenosodaxavubudaw.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/h0gp78tbp4voc5shsn4aaok8t3/vegenokowu.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6cdac9da21e12eda7b883384069d2e94/subodadatasusoj.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/wemumek.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d280e65f226---77134873219.pdfIn PDF document text
    • https://hanomanberjaya.com/contents//files/jufuzisegopupojobila.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/danotizefudafarugamilus.pdfIn PDF document text
    • http://wdnederland.nl/file/wupiwafep.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/fbe6ca2041a9e2ef8745e01f9927de44/66916477042.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa955cc9f0---29046522676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=scrape+pdf+with+pythonPDF 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_off0000b9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD208 16384 bytes
SHA-256: 866e759831044dff00d3a57c567edcd7118bf1b739ade5c3d7db1d919e8fade8
font_02_sfnt_off0000fb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB89 10776 bytes
SHA-256: 06a8d390a8bba258c3a72b38f6f8e34dee25ad0889c7acff652dc32bff168f0b

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