Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e800fc419edd157…

MALICIOUS

PDF

84.1 KB Created: 2021-09-12 01:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8e54dba4389baafa4bf600ce9a2f21aa SHA-1: 2574b0ad9528ec11f3bbb0e91a3f72d7676423c5 SHA-256: 2e800fc419edd15754090e2762ebd1034230cd2956fdaa3a8e1462fc6db5cccd
164 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 document contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious websites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613024af43802---55095897178.pdf In PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/45011803421.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/39652970359.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/34557224751.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134077e2c3ad---49927844274.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/hlesvna84m3pen25b7lria5nb2/24097603508.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/moxorerisa.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-9-8/20210908180613721463.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/93643795186.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/73308082625.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109070542408407.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/78124858351.pdfIn PDF document text
    • http://matras-devison.com/upload/file/wopabebozawadat.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/52717572548.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/kovorokizarup.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/wuvavifase.pdfIn PDF document text
    • https://comillaspostgrado.es/userfiles/file/mosomu.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136cda77116e---79012157428.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/wezejafezoxugituke.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/16150419311.pdfIn PDF document text
    • http://kes.org/upload/editor/files/9872724355.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/pefiwin.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/70454770055.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b142e9537---16540558690.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5061c7488---julakokemitaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=recuperare+dati+da+androidPDF 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_off0000e2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 18636 bytes
SHA-256: d5f53c0b0aba49bc6519827839ae4081df26335d07ee4448c9931ae124f856f3
font_02_sfnt_off00012b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B65 10440 bytes
SHA-256: 8f948f71609905a8d47936ea9c732c06ee3c29abc1d8b49d2601437ebec40960

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