Malicious PDF — malware analysis report

Static analysis result for SHA-256 289e5241fe8c778c…

MALICIOUS

PDF

79.8 KB Created: 2021-09-07 16:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e02d93c915799afdd35a7bece9246ecf SHA-1: 9af4ddc583b9a98ffa756d8aa6244510bf2eb052 SHA-256: 289e5241fe8c778c95ce27b0f15fe4c77de17eee3d11a489d468fea3f54a7a82
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a link farm pointing to various PDF files hosted on potentially compromised websites. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the malicious payload delivery or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/1npuppmahkq47v9crue0j5lbs6/bobulosapusenividuloxe.pdf In PDF document text
    • https://proartgaleria.hu/files/files/15741054965.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/46032655201.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/magagexito.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/48592306707.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/3476063334.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/14a7ea60f30090337a8e085e1ec90fc7/88768958650.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/terenugoteferugamexafow.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/ab0a178273ce256f7532619003e67820/19688853574.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/13686021746.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/74543053795.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/buwudenajomu.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/vr1mqbsgbs26fbvsjvk920mbt3/38158366035.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16075efbc966f8---23267096317.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/zofemeki.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/99217227443.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/7430289627.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac48e6cc202---gifedirodovilazagapamipo.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/jedixemevijunaxozez.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/71c7e4afd865c09ebbeb434fbe38265d/lozaguweserakibaduda.pdfIn PDF document text
    • http://mths1965.com/clients/6/62/626de2090e8268457c7577d5e8b87900/File/meniliwol.pdfIn PDF document text
    • http://soflocops.net/clients/81266/File/zabijunuwamodumilatuwib.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/78237920645.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=spire+pdf+converterPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/gilusebibikekaxumeba.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_off0000d6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FB 16684 bytes
SHA-256: bba6d53b698750a8bf3a5358f58935e76b82ac0343290a5302d808c073ec08b6
font_01_sfnt_off000101e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E9 10380 bytes
SHA-256: 485111626ab5e8b2787f8f5964da5f0083d64cc7ecaac54bcedbca7b20415357
font_02_sfnt_off00011983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11983 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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