Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9eb7ead0de230d9…

MALICIOUS

PDF

78.7 KB Created: 2021-08-27 05:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: acea24411146df663381808d15aa93f2 SHA-1: d8930aaf0e79e6aa6f05e9cffe409b76eb15f790 SHA-256: d9eb7ead0de230d9d3b1f54235e5caa7b97144bb891d55d96d7ac13be96e03df
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve further malware. The embedded links are the primary mechanism for directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/81780ffbb69aa6844b0efa2f09094640/44242905812.pdf In PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/84a91b5fea602a502731e3f3302f3acd/xegofafa.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/gonadogubovebuk.pdfIn PDF document text
    • http://www.meditt.com/wp-content/plugins/super-forms/uploads/php/files/49vd44gu90unoiil6k9mqui5qs/rifejokavogovomadufuf.pdfIn PDF document text
    • https://aromamarketing.md/img/files/dolenavomitom.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100b65883601---teputulemajawap.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161277174f2111---xobanemagesiwu.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/vefimujugoxifuxapuwobe.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/mb7m3elbfl92qeb2jqlenutal1/vitemuxejezariwu.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/138f8a3839383e89c7bddb4bdcff86d9/86634571351.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ff90c634509---gotalexerarubotaf.pdfIn PDF document text
    • https://netpage.info/userfiles/file/2876494743.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/vewutar.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/sivoxosuku.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b520a36424a---42184861320.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/9b77796b43fa52312adeafa6842ee75c/74781089283.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/97949391877.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904056368c2---wudonevisatimigilimob.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/vobokodimapatavapulugo.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d79f95c87---botatatatilujedomumobe.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160975ffacdd3d---zivixaxezugudu.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/mesakudegomaxutazalud.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ithethndd79mpch7acg4kv49g6/69778662686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=low+frequency+noise+in+housePDF 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_off0000d383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD383 10532 bytes
SHA-256: 0db8f46f945e7431c2ce1374f0dabf2aef1cc3c6fd86e6c5cc81a09d737882a7
font_01_sfnt_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10395 16216 bytes
SHA-256: 011a2c4c4bd47bbc4616cde9a36385b374f29b768bd35d5b7a35dce0e31c150d

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