Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b662774cef86dc…

MALICIOUS

PDF

78.3 KB Created: 2021-08-30 17:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8fabb25c703a712632aa8a3c30aa1bb0 SHA-1: cee87ebdbd48fab8e9af1fda18b7cc22e5497464 SHA-256: 92b662774cef86dc3f66cc15f5df35b846bde2f5b40d0dd9cbe35808e6cd98d1
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to external sites, many of which are hosted on compromised WordPress installations or disposable domains. This suggests the PDF is likely used to redirect users to phishing pages or download further malicious content.

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.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f8660e061---magamirebulepixibojes.pdf In PDF document text
    • https://oriental-kitchens.com/userfiles/files/86398082697.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/06/20/47342314270.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/39766901660.pdfIn PDF document text
    • https://mollis.rs//files/64822402316.pdfIn PDF document text
    • https://silga.ca/userfiles/file/45925605806.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/5d217b05129da4558035fa596ea20621/noxozasuxigulo.pdfIn PDF document text
    • http://oprfhs70.com/clients/879438/File/lobuvewi.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/77c51b1b854a4e344f30be9645089fe5/daganuk.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021060202554442.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb25c28f4e---15154195411.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a750ec70a7a---binuxonupuwadeze.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/pekf0mu418oh2q81lq2hmt2876/10236260665.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/xosewijujexebalujodopel.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/gasefisatotinexu.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/vukivuwexoxibozuxibugefig.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074465633c23---56385055696.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210510075019.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/kagajirofilalumolewevuv.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/am06bes3vr4hudp2p5fre4plj0/67393823458.pdfIn PDF document text
    • https://yellowstonewildlife.com/55460613881.pdfIn PDF document text
    • http://iphysiology.ru/upload/91823392991.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/luzige.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/satakuwubumad.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/6a9614edded8a8ad50eaad66b551a2b4/vexobovulovogoxowobowetu.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c53c976ff05---5598950575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=single+ventricle+defectsPDF 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_off0000d090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD090 10508 bytes
SHA-256: 585bdb1cd6f9309bacf6036f539015f7f9c95bbd54ba95f272913525409c47e5
font_01_sfnt_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001006f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 16740 bytes
SHA-256: 514990bf4c26576fbfd962a5134388087aa08e2508544c05e733d12dd8b61e74

Open this report in the interactive analyzer, or submit your own file for analysis.