Malicious PDF — malware analysis report

Static analysis result for SHA-256 006023f03b9f9bf9…

MALICIOUS

PDF

81.4 KB Created: 2021-09-03 23:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 82027ce276db12b9f95b55e3046beeb8 SHA-1: 7e7cd0a5c7e6842a7ee770593e456512da856e2c SHA-256: 006023f03b9f9bf9a290f4c9d331d22a265bc90b68f8c9d30e9c3d8951d43806
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd75fa30de---98015891749.pdf In PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/891ce24f87a602471b17cd4ca1967d4e/sivajezupofebujos.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/lq37j7egasj0t4m4b3tef7dbng/87286978364.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mubonulupibabesamumo.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/wenogugefig.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa36c450fd---mofura.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/ce1ac85953cc423b12dd908ee684eb11/21442006368.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/sekopewowoxumaxokub.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202181405750.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160984100bf4f0---pixewipowibo.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/56341962882.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/7176195491.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/e9861aaf01c8dcabc75bbc4f043d2e1a/46869922805.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/86091844352.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/70895419556.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/55837862604.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/pejin40dlieqlrbde2s4b9ul83/24062549659.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/zizitexof.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/90d4ca1c7266917a0c8dcb7aa46a60e8/rozoti.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/liripurufirodalebugagu.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/waxinuniboz.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/72782628992.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/rafazodib.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160823a0797308---45840134545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=khulna+university+admission+circular+2017-18+pdf+downloadPDF 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_off0000d4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B0 18148 bytes
SHA-256: cd4593831859bb2af78511a6d8563711c9e48c4db61564c51ada5960de8c0fab
font_01_sfnt_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 11828 bytes
SHA-256: b79b9e26774597e022295855164333090a0b2d8eb9bec79ffff00085240d3027
font_02_sfnt_off00011fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1