Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de1d6c5799d691a…

MALICIOUS

PDF

84.0 KB Created: 2021-06-30 17:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 77f2010a0a44d9c9fb8d994ba9d0bdb8 SHA-1: 6e354322de5fc230ddde5af5377408e867fb0c17 SHA-256: 7de1d6c5799d691aec1fc9a38746f3ee8f0000ecebce057eddb5f991375c814e
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. These links likely serve as a lure to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://gemculture.com/userfiles/file/rekilijifalasodijakilemu.pdf In PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ppp8a8gdq9ehd94no4bi6r8jgd/kagof.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/e0280b85cd7c9310a8f5361c2f4a3caf/tunijoxevobixu.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4058246f6---nafesolifabatunotegelulov.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/66327265649.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/wevutawiseneketuxutigiv.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084d5d6910da---fukodubufesulixaxomisa.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609483e1eeebe---lipobepajojimozebeguto.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2ebb8b698cc6d78efb71bf251f39e19f/binikupo.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851fe982d6b---repakamavigixoki.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d67153a2ca---fovonudikutegutonifatun.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/zumexetobifenavivakuzufo.pdfIn PDF document text
    • http://plastikacz.cz/soubory/files/90427139624.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/26e74f1c112c5e7ca997571e9869a911/wevapore.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/86147600079.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/lewexugopejewegunugowuge.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/fiwosuwefuzajilejigezuwi.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/nasosutejaxezok.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/33302773097.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e05b2d1376---lotinagov.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/452b9pp1vq0pbb5n0kc12vjod6/8332582380.pdfIn PDF document text
    • https://soliangco.com/contents//files/kevijogiguburevo.pdfIn PDF document text
    • https://redaelzaqaziqy.com/userfiles/file/18298444583.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/xudowebisaresazipuda.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71e327a44---16895829882.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f2af05f5a---lemibekegeji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sql+server+view+with+temp+tablePDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/38226020525.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_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 17008 bytes
SHA-256: f87e8db4da92e8e9ab4bf91b84703f9fb8456b565ce7b8731b180673d89f3152
font_01_sfnt_off000111b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CB 10804 bytes
SHA-256: 611f5e16711d562dd694ea4fd9433f115361c4bd36c6a56b196a88b84437da04