Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db06cc82d39f373…

MALICIOUS

PDF

73.7 KB Created: 2021-09-04 01:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ca7984a7af1b02f8db437bbbea19b2ff SHA-1: 3c799f51a46959e73984613da63637b8a6dd2131 SHA-256: 2db06cc82d39f373ef2f08b5e5584619827b36de638a7b75356e206b8d3fa5b1
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. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://catamma.ru/uplcv?utm_term=canon+ae+1+service+manual+pdf PDF link annotation
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/b460bc3dcd39209bc6c0daf83b717364/68016336713.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/womikidesutavusetaxe.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/33293353280.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ced7cc5ecc---jufisojakimibigatenumitad.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1623482567.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/80961264366.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/pilanojidowaxok.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eff56b1f20c.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094d69721a2a---juwuriso.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lnmbg29gob443qq7j9r1vk0b10/fafawotiliwipet.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/piwisizavijamuwigisagoli.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161239e111396b---fidizijeperapefo.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea692d1d52---fuxeze.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/lovatuwilinaril.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/sosezupuxuwonedelenudul.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/rogodipunud.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/66136682880.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/7e442d895e735fc3b4dc28cc5c810495/24067805216.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/mubedivebate.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/sviautknk0b52jdvv5d2hblesa/76114332207.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/3793784732.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8460b5a0c---wakiki.pdfIn PDF document text
    • http://www.andreapondika.cz/file/fotogiribud.pdfIn PDF document text
    • 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_off0000bb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB5D 10932 bytes
SHA-256: a3d470629100934d14257cb640e09b1378783bf0f5754d5ae4aca9c67613f0ca
font_01_sfnt_off0000d4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C1 17048 bytes
SHA-256: ec4ea019f0428f675b7879182f05e1a32810cdfac68d47d9a3bd51ee216d4b3d
font_02_sfnt_off000100f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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