Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ec72f2d2e870c7…

MALICIOUS

PDF

68.9 KB Created: 2021-09-06 14:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a4495c8983a5baa8739fb2bab3d1adf SHA-1: e916337e23a87fe5acf298d7ee9a60f5a4cc4878 SHA-256: 08ec72f2d2e870c77c1ddce5e7812eddf01d070ab43659ee8645fdbc339f40d6
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'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768c87d71dc---53447298191.pdf In PDF document text
    • https://linhngapt.vn/upload/files/jonofedofofixoxif.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/retedejoworuxij.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/faruwewumumuxategew.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/89560675401.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608efcf37309c---92620227793.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///lijexefuwewizaxega.pdfIn PDF document text
    • https://mcrlclient.com/ckfinder/userfiles/files/6438398587.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094db0b5dd97---2563112423.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160804f61ce18d---37399474495.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gatowa.pdfIn PDF document text
    • https://mollis.rs//files/96500565320.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbcd6022625---20618857534.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/jobovejefomimalot.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/17491348049.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d592a215f---pezipunabero.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/nizovulalodima.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/d67715ecef62d40b81c9acc5d1ac1aad/xoguwutefaduroz.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/16f2f9e3070a6b5de233a7de3604d829/50707417360.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/30667026395.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/sukoruxuresusubal.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///jizapujitiguzulakukavado.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/13612066447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=bascules+compteurs+pdfPDF 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_off0000b215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA27 14524 bytes
SHA-256: a35501ff5663b50dddc5bebaab63ce239d3fb407fa9222fe6033bfd7193bf0c4
font_02_sfnt_off0000eda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA5 10740 bytes
SHA-256: 061f0609e2552ea4f622e7f15513395fce481b525ec230454d7d50bd0b5296d2

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