Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26ece7de99b1ca9…

MALICIOUS

PDF

72.2 KB Created: 2021-09-01 09:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d66233fe369fe844f2bc29f2fd5840e0 SHA-1: ddc49774e264216ccf59ddf166a9240e1c8ea8c5 SHA-256: e26ece7de99b1ca9d1389907776f8caca01bf556e8cb0535283cadcb8f4d3279
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 https://irlanc.ru/uplcv?utm_term=stay+with+me+flute+notes PDF link annotation
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608613e788baf---90237510208.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9e62b1cd7a16467e5a7714dd34d6c6eb/jiketaximumak.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/kaguku.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/tajavasuxofuvipebu.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/56428891249.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/3ba55eccc85cbe8e441f03aa912213c7/palalimamix.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607416afdaaa5---58154316433.pdfIn PDF document text
    • http://talleresjpg.es/img/file/52593826723.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608506629162d---tufuwibogapubife.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610db8d6d80a0---topimabawigipusele.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d1a20d98b---95846022664.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aef183edf27---linudozupufiva.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/bikizedep.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/65c25d42c5a311c53f5ced93b05d8145/59272663717.pdfIn PDF document text
    • http://riversedgefm.com/files/file/57185658088.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sakitesedi.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/768920aaffa55416aa8d5f6f5c744ecb/83724501072.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/pewafeladaguzabu.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c734b3c3847---78202626863.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160746305c38e4---ziriwilufigotiwiz.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/7mp699bn2924idroc73p1d5864/wajata.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/beratupenozifojow.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/vupizagivezezoxiwir.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733ccf35ecf---55459568315.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/4902f617d253ecf42c78c0dca26abec7/20114984848.pdfIn PDF document text
    • https://educhina.mn/editor/files/jurawoxukab.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/bofijoluniwexukigemu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB5 15084 bytes
SHA-256: b89d8b4ff4802d50890ac18c1095f8a02f157fef2247afa9e29d590ac62e270a
font_01_sfnt_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF883 10752 bytes
SHA-256: 87675df58030020ca9ce6d4c61cbb180ad91ff05c5098a8afb69de3375b8c230

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