Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff047e6237f21a1…

MALICIOUS

PDF

153.1 KB Created: 2021-06-18 19:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 747cd8029d72ec64b5a42280769a50d3 SHA-1: 14460ad3f150455942560023d1cfe6d231ccabaa SHA-256: 3ff047e6237f21a1305d785de5cd96206ac1e4edeffccc10b2e6691d54da7a88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, indicates it is related to 'Metodos de valoracion de empresas pdf', likely a lure to disguise malicious intent. The presence of external URIs and link farms strongly suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ju92f4a0ci5snvn7l0ff065mct/pesokijevezuvasakagafeju.pdf In PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/add25d7a7571f94c98cc439a01f4b28d/tofujadasatogosewidapaz.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a312baecde2---sanizupumagi.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/49f2fb063bdb51e2beeee88c782be6de/vagepux.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/82c0fbb1cf6cae7408fbfe93a791b5dc/gavafexasivuvob.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/fa41316fd6b623f0162935afd051a295/fotezotuz.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/661633f8c8d5ed20c2021eb6993957df/bawejinizabexa.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/3645590a2f1a5b6d1035badc94794161/fekavajafi.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/jevavirowezibipofibuz.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a037895242d---loburofikelumegenitudek.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160b404c795ded---gurazufigetozomopo.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/2787479ab5b2a98d8b7b491b88808a20/44496295873.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fca112a7f7---sexuguvolopixifuluwegamu.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/bozalagibafalilezotivanu.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/53c0f41be3b38770a1e9e7555de05f6b/niravetapetunuk.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=metodos+de+valoracion+de+empresas+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20095 7868 bytes
SHA-256: 55637d2cc6bf652caf3adc4d115413487c205c5041fd8d526c3312981ca1d92c
font_01_sfnt_off000216fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216FD 5368 bytes
SHA-256: 851291856262baf4950c2a07c67c2674fb56eca6e13d85d12593eb257082f32a
font_02_sfnt_off0002293a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2293A 13632 bytes
SHA-256: be8bb12dc404183fba712fd707b4b47a273235e00241a1771c8cc3a04e0862c8

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