Malicious PDF — malware analysis report

Static analysis result for SHA-256 367502e71087fa0b…

MALICIOUS

PDF

90.1 KB Created: 2021-07-21 17:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fedf96deed9924e08db966fdfb28c781 SHA-1: 45780b1e35b7696209620f2616c64aed8d9ba8fc SHA-256: 367502e71087fa0be77c3e295cfb4c2b474df843af74473a0fcd5765b38777d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The numerous embedded URLs point to compromised websites, suggesting a phishing or malware distribution scheme. The file's structure and URL patterns are consistent with a link farm designed to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9517f3418b---83214208740.pdf In PDF document text
    • http://atthaya.com/file_media/file_image/file/wefufijirida.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/68597744172.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873e0159230---takilow.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/47325792649.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/feretinif.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/73535826228.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16086b02134e9e---faximepaneku.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/44401425359.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/gobunubegunarisibol.pdfIn PDF document text
    • http://masonfamilyreunion.org/clients/b/bd/bdaf0a3c19eb5f10f0519c747c117e37/File/fozagalipajamopadibopom.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/rukow.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/lobimuro.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/93245435947.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/92338022134.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/5ebri3bidsb8ho0b762nbq4k6l/70922103025.pdfIn PDF document text
    • http://www.puhito.hu/uploads/negadoxope.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a32ebf060b2---5547655606.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/72564120594.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608710032b181---sapidosaxa.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/68b598decd864e5d31d3a548ad8657ce/6380646096.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/13167804255.pdfIn PDF document text
    • https://sensorservice.org/userfiles/file/36753803829.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/34697028399.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/71738219778.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+get+period+stains+out+of+pantsPDF 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_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 17776 bytes
SHA-256: 09cc368fa3f42af146f3f9146f8115caf88f1999d27dc91d10aece06292a61a4
font_01_sfnt_off000128f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14110 10804 bytes
SHA-256: 33b3aabe33e4044e4dbfe380466ccd97614e7492331e6ba733a8c3f24624cabd

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