Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24219c169241286…

MALICIOUS

PDF

90.2 KB Created: 2021-08-07 02:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 46c046444525a929c62c33b15ad065d1 SHA-1: 2f3ee4cefbcc2f39f9abe277bb38bfe1b02debe0 SHA-256: b24219c16924128654ab228d7170e8e5080eb3a5b19bf8aedd4c68912489754c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. While no scripts were extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://propertiproperty.com/Uploads/userfiles/files/9301730396.pdf In PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/98538169395.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072e5ea922cd---85109865575.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/38997728275.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/kojikona.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c6cf97c1d2d9bdefbecefc1a789a8054/pabasix.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/romegunipasewudepog.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e7282fdab---mulibizojevagafusawuka.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d98fbde458---jevewadoxisetogazekej.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/79477537933.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a832a3182a9---24961820207.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/kekugixuvarajeloz.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/9644751465.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/2t871mranneq8u97518cb9m28k/88791331283.pdfIn PDF document text
    • http://saxons99.com/clients/5/5f/5faa49e4155ddd0d4faf97b0d7aa3dde/File/rerezokipisiv.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/4059fc723e0d81a44946373b78cc1d8b/nulorepolerunanap.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/54145935531.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/08a640111c3c3d5f30fe033ab7a8df53/43244515132.pdfIn PDF document text
    • http://watch62.ru/files/files/53606728093.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/f0eaa7d0636248e2e63592b64c0a9858/pidomeri.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/36105027190.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607688d608ad7---80674103359.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=patterns+of+world+history+volume+1+3rd+edition+pdf+freePDF 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_off0000f973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 17864 bytes
SHA-256: 185f8f7f04fc78d68c754544cc1cc0fa24123b486976a579d57e0b8c86508d8a
font_01_sfnt_off00012604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12604 11352 bytes
SHA-256: a1f19f13653c2986bda7b7f6c92ffd1300baa4c8241b2de0e834d2f651b5e4a1
font_02_sfnt_off000140af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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