Malicious PDF — malware analysis report

Static analysis result for SHA-256 46626bd5dbaf7ba9…

MALICIOUS

PDF

70.2 KB Created: 2021-05-06 08:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ced438ec000770ce9c14e58be9d2621b SHA-1: d02bed988c47e0adf24453c205af9f359e797541 SHA-256: 46626bd5dbaf7ba91664e1d99dd733b9e6fb414e4915e5b89a55ea95ad89c38f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links likely serve as lures for phishing attacks or to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/c3392f3e18118f1978e836b3ff8df5b4/71651130826.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070c338be148---57120926766.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/0be2a4aa3b7fb1905fcf968985f960b3/kolozowib.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/7532e91dcd6b051a047e04a49e0e060b/43554746819.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160794b5b202fe---madudugotagufuduj.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c2264c119---41588790950.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/88ac1aafb8e9309ace208ab853c07848/tesados.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1ababb5dc---96604282303.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160855fd2dcda6---7621895721.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/b52b9eaa295e15a60338837dde95eec8/57802609761.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/cuvtusmpuc18f35uc7mq8ulnra/79163721218.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/2e547a3689de4d7489fa6af11984b522/xoripipakesi.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/49854305320.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806cb90dd3f---xifiwarupok.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/gapopubitanakokibemiwum.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4613ccbfc---4375775885.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a916a47f0---3880875505.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=numerologia+tantrica+evolutiva+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD362 5328 bytes
SHA-256: aa4e1a24945fe0c3d3208380310781c5b86b56601cee7d32f5a18d20b07c30a0
font_01_sfnt_off0000e57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57B 11172 bytes
SHA-256: 03e07f2f3131f108d6c53491c26ae4f8ad20def463b513122623b2c8dc80739a

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