Malicious PDF — malware analysis report

Static analysis result for SHA-256 59728f0ceb433bfc…

MALICIOUS

PDF

84.8 KB Created: 2021-07-18 16:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c893c539ac3dd6be48f8038e52188507 SHA-1: 52727dc6faf89b53de7b63159a87ece781706e49 SHA-256: 59728f0ceb433bfc62c5a8fe0b97de487f56a5617f1f410eee710d6c0a0085cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://broadgatecapital.com/userfiles/file/mutuvokigodava.pdf In PDF document text
    • http://vdavloeren.be/userfiles/files/92917678954.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/0b9be5bbb14551a1aaf4a9fb01102424/68447756853.pdfIn PDF document text
    • http://vgkbuilders.com/assets/files/34251801498.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/38201412433.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/rifugowel.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979ea6ab996---87606340255.pdfIn PDF document text
    • https://12tiga.com/contents//files/71569192909.pdfIn PDF document text
    • https://harom.ro/files/file/belumexizifu.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710082ddf0a---98332756083.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ea9250a135ae753568c963683849b20b/kezejuvilit.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/53246311196.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/47896196856.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16088723c84cca---83709293642.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607debda531a7---93231335797.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/26018231491.pdfIn PDF document text
    • http://ausafe.net/images/art/files/mizogijewinexujam.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/fc1ae2265a756efac987677ec1b264d1/87675573708.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099b4da02d70---93139965151.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/f65137361af5d80c16553c09138d6727/duwosisefewana.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/ab2688bbde0a8953323810a51f37ba74/41216382049.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/desesekulafesefup.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16216039794265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=deadheading+double+knockout+rosesPDF 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_off0000e8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C6 10980 bytes
SHA-256: d4ce10c30d4dd9cb272686a1537c40c74a00506701edc36e2c720a32dd55d248
font_01_sfnt_off000101f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F4 16856 bytes
SHA-256: 118ec932175bc32025d4bf24f1847589acc8bc1407359633697258f62443952e
font_02_sfnt_off00012df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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