Malicious PDF — malware analysis report

Static analysis result for SHA-256 7386c7122b296dea…

MALICIOUS

PDF

73.4 KB Created: 2021-09-04 20:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9221516bf4d1fc1a3dd1212b49ccad2d SHA-1: 081c3a8b60baebec37674e45bdbd103606e0bf38 SHA-256: 7386c7122b296dea4406498dc543ff4b41d155b55229a30bbffcb38a70266626
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://himalayanwanderer.com/himalayan/userfiles/files/valanimizuniwegizob.pdf In PDF document text
    • http://dichvutheapec.com/upload/FCK/file/2708772643.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a29273b5630---76031528099.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881eeeabd24---fuzokitidutojitow.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/68883687012.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/52242715921.pdfIn PDF document text
    • http://gazetavk.ru/img/file/pajakeleregokitudasilize.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091ec897581f---fobirirosuwos.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e6f43881e---83900039430.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210707_EF4F36300027F06A.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/39281807035.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/83074286291.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/5d6fd4b13616903df7c153d8a7657ead/8389222581.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160df9cd4371f4---nenipakuwesesuv.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/beduvepoduvaruf.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/45520069681.pdfIn PDF document text
    • http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/xukape.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/roladarotizevu.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/medemapiguzilamukofimide.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/suefn6kk3kq87k8kcd428ddi28/ruxebapozipo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb1530adc58---mizomapotorajijut.pdfIn PDF document text
    • http://cjpharmtech.com/upload/files/nawox.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16076b6e2339af---kimesawumununasimasumuga.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160917fc1b4c34---98482392776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=investigative+report+writing+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_off0000bae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE8 10728 bytes
SHA-256: 8c1e77190afc9f3406e3493fd18526f5a1cf8ff999a7fde618783b677bcb51e3
font_01_sfnt_off0000d38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38F 17940 bytes
SHA-256: 1b80373325b83c52809cce62570879cf64af5b7a76c0de8de216c7644c4f3115
font_02_sfnt_off00010002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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