Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9ca89498f44028…

MALICIOUS

PDF

88.4 KB Created: 2021-08-03 00:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 844176be43ec3472eb9604f66d9191d5 SHA-1: 257c2de07488c326eef5b64614820fd082642c53 SHA-256: 1f9ca89498f44028b6d7ff9622bcb2716405f5bba72d1e9f553e37da03cd21bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous websites, many of which appear to be compromised or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mobilesamara.com/img/files/file/64182739861.pdf In PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/0721588dee9031b01e7ea9c83728893f/3480305583.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/42611887468.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/72165961526.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/78b1db20c70357b01cbca73d57769c0d/dejereropuzebekij.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/23784004744.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/xijanoletesinaxerodutenam.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/aff93289cd7ca30ded4fae2601284e91/89839237649.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/83501696275.pdfIn PDF document text
    • https://sanagustin.cl/files/33353386258.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/420a59fcd254dbfd66ddf4489465d2bb/ditudemopufunitejedelaza.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/bilanod.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2303290dd---25113161588.pdfIn PDF document text
    • https://360mart.net/uploads/files/negasezuj.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/8p3n5klu3hfatsdb36bsj595e4/37090367337.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160fdaa65e8fc8---49895097441.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/98994747189.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/rqtu2ijrqn5jf4iddkt35h4454/xijosizu.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/64260184403.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/60146520698.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adccb582abb---10875420117.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/waxikotuzixitokejidu.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160dab5e6c20cf---ninedirekim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=simon+vs+the+homosapien+agenda+movie+vs+bookPDF 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_off0000f664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 11068 bytes
SHA-256: 3464a4155d66fa23e9da253ec459180865e163d014ac43009299f269d6ee7139
font_01_sfnt_off00010f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001279e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279E 17052 bytes
SHA-256: 358b7ab57c615bdd3197c65c962d771c4fea1aeec52c36570bb0ace6ba24f525

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