Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaec2eb5cdd33a44…

MALICIOUS

PDF

70.3 KB Created: 2021-09-29 09:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f8916989431e401659cf37438b048b79 SHA-1: 96e91f0eaf056f8f6b3ef777575142ef5ce48bc4 SHA-256: eaec2eb5cdd33a44821badd1bbb2a6c56b5255d4715e7c2548377b63167b0b3c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are structured as link farms. Heuristics indicate a high likelihood of malicious intent, with ML classification and ClamAV detection confirming this. The primary function appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.juniorcollege.cl/ckfinder/userfiles/files/furagevitatebiwasegozelu.pdf In PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/favufop.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/manisunuke.pdfIn PDF document text
    • http://3m18.com/images/editor/files/polowobogipigavovixuvir.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614242fd7998d---94579735275.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/goxopeju.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/90203313898.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/wozatofuvajifugapetakuwof.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tojar.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/f814b5a608ec8e1d3e1ee18fc4354b06/wajudizap.pdfIn PDF document text
    • https://medius.sk/userfiles/file/5492370834.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/xuxemenarowikizagada.pdfIn PDF document text
    • http://stromzeleny.cz/file/46494008399.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/43829784578.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148b013841f2---lilalogedajifo.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143e7689659d---kopared.pdfIn PDF document text
    • http://master-vin.ru/files/file/74365351402.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d14131fe1210e0a769cd29da51bf5d4f/28063758411.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/xefiwemunafaxevarusevafa.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/jumopenipixat.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/komawes.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/12970535541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=download+mobizen+mod+apkPDF 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_off0000b29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29B 10568 bytes
SHA-256: 0411610fc69cee1dcb46c76b2df3d5c14e4727e70de6fca3d3fcac42a64d704e
font_01_sfnt_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 16136 bytes
SHA-256: f518561700213c481ffbe93fdd888ed5caa48e9a27972360bcf1a9ecc0cfec54
font_02_sfnt_off0000f39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1