Malicious PDF — malware analysis report

Static analysis result for SHA-256 8450edfd29fde56d…

MALICIOUS

PDF

78.1 KB Created: 2021-09-21 09:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5686eaa231d69d8233d44acaaad02970 SHA-1: 3f0ba236fa6de73c3f8f4698c9bf4813c6e5a995 SHA-256: 8450edfd29fde56d092dbfd347c8e25537d2c2900cfb0c2c1a493cf254067469
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed for phishing or spam. The embedded JavaScript likely serves to further obfuscate the malicious intent or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://huntic.ru/uplcv?utm_term=full+body+scanner+apk PDF link annotation
    • http://kingsfci.com/userfiles/file/roludapametetiturazofu.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/40444406700.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb7d65d250---vuwag.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/jimupoxurazuro.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/17893918405.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/71704039609.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/nejufijeseb.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/puzalomo.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/e1c74b64df980f02ab8c5d188b6ec4a8/jukafetijagajivodixurowo.pdfIn PDF document text
    • http://vilniausgreziniai.lt/userfiles/file/tinaxolesigemunimimelupug.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/vufogekagarowezako.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/0c5a7f365361451c1d35ddede3c8b247/96093829326.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/mawinexumaga.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/30912148206.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/27961736279.pdfIn PDF document text
    • https://angkalaris.com/contents/files/38430804377.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47776200760.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16134ea7858520---4741322869.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/funuwigo.pdfIn PDF document text
    • http://xn--elementy-zczne-kwb98g.pl/media/file/kefudut.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/evnvl6i6pqt16oicfnrhe8atol/76540630402.pdfIn PDF document text
    • https://sowlindia.com/userfiles/file/sotefegenaxaneg.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/39550074859.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/f4b1cbf6c35da6d51ff3ca185cc1d9a1/guritevomeki.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/92911581053.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_off0000c992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC992 10740 bytes
SHA-256: 47afae281375b72570d4553c7262d9ba9a5d1ed42dfba254017961fc63f5ef5d
font_01_sfnt_off0000e224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 18624 bytes
SHA-256: cb23bfb7c7194355fb6b98c7a490559ef77ab3e4f98d14e94f5c18b0543289b8
font_02_sfnt_off000112f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1