Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d5db5d3b670992…

MALICIOUS

PDF

86.5 KB Created: 2021-07-03 04:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 58017ca33d920215954e96ecf04dd297 SHA-1: 8e800f1ea2d426d5937a3dafd3270734fecf4e08 SHA-256: 17d5db5d3b67099231c69af6fd78f64ce771bd8421cc6a1e5bfbf4b47c6aeabe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm or redirection strategy. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 https://smidgel.ru/uplcv?utm_term=translate+tungsten+from+german PDF link annotation
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/uqo4oc3nctce3dlfgeooh19ai2/48457472748.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16079b103ad0df---joxef.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b6885146---61469907737.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/xagedukoliposimixezim.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609071bea0965---51026447654.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/030358255713.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/395ea1e9e78421f543047d6fd6f8c913/91531827532.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/47666471957.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ed50eef06---jinegonejesobitodader.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/f5d2a74da30b2fafa80e4cce935350dd/21688071042.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/4f0d302ccdbb0567b68ae413614396c5/fibilomudesotukir.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/gurevosesukomip.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/27120efda9b7da44a87530ed95e8f238/fifiva.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/bc7346431bf7819526e2ace3d0b9ffad/tiruwotomozatubiburol.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/wajomunimiwanibadomi.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c65430a32---82098162491.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081fae0dbc36---jobimuxunevukeg.pdfIn PDF document text
    • http://aps-mes.com/files/file/66862423247.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/de76ac055b29db839afd1e0f6532df28/78839715597.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/90b6485e00e9a7fd40054bf980c81df1/55938709346.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/90558518523.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160778e3fe77c0---puvakaj.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/wagatal.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/k75t6eq89041jhr2577kaje0qv/soruvogalagekoguvuju.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C1 19052 bytes
SHA-256: 12c0d177c370a30fdeac715ce78051711abba609f63d49f6d92e40a5c1dda2be
font_01_sfnt_off00010523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_02_sfnt_off00011a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000132b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B6 10528 bytes
SHA-256: 7e0c6ad36e7c1b5126ae63cf8003af9fc8fa9c46b4aa0df6601b8db125b3bcfc

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