Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9215363738fcb68…

MALICIOUS

PDF

96.8 KB Created: 2021-07-06 15:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e805fa0630b2c631474a5c932905a58f SHA-1: 17c961efca842e76651f2ce68871f2dd4ca15a03 SHA-256: d9215363738fcb683abc7f69f8941f414aa04aeb0b98167e876f70ff230c7c98
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm or phishing lure. The presence of these links indicates an attempt to redirect users to malicious or compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/rkfer1ua4ir88ltttibv8uj83v/fuxanitopi.pdf In PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/n51qpf52qh1rj96em0afh2vp2h/3570799922.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bdcdd4234---depadonugesop.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/749ad6vuku7rlb8jdetrj4u2j0/75876397770.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/66835314266.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b20caa2b9---lutiniruzinekub.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdec346c7cd---taputexalinugulebeva.pdfIn PDF document text
    • http://vicorsupply.com/uploads/images//files/kadevebabemuf.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/7c1bdeca3775477ca5c75a4c9a63a167/lupuzowomurudo.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/lazigabibu.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/96ebb3a43d56b3778597b168f314b421/zosikujugizamatijo.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/sufaganisiruzudegituvobe.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/risalesimijafizu.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/68536465261.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/260238268876.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/taratumiladana.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e835263db---3299600255.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160def94d2f2a5---zujabivepubiwekituxurowiw.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/p3g1grdl0l5jtfv570oomaq67k/35483522713.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609046d67fecd---gezofivizejanemipapenub.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e5447260e---ziligoraded.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/j1pq2m79u3hc8t0m5aal6325l7/6095283754.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/ea56b42cc059a48cd0e0323101e5fcd9/boxoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=moong+dal+chilla+with+vegetablesPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A5 10836 bytes
SHA-256: e494307abddc1dc3ae12580daeda76fe163a6bc4e5f4429aa66d3a9ad7dcaff4
font_01_sfnt_off00010c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12488 18348 bytes
SHA-256: 1517f2ce3c531eeddcb0e106758f3ecac124a550ac17268cc8ce90a128c38b17
font_03_sfnt_off00015496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15496 1824 bytes
SHA-256: 065c7a4f11f9e75f6e8b37807bc82b370f7b2846456f0b3b832c619392bb01b8
font_04_sfnt_off00015d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D22 16744 bytes
SHA-256: 6e981b781708eb3c6a76530e32a4a0dfab58839c4151c236aebb19c43b0bd513

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