Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f9f245cd6d9b9f…

MALICIOUS

PDF

99.0 KB Created: 2021-07-28 04:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e6a1eac83fc302da4e6df964e5cdefce SHA-1: 33115c01690f500ee49a92ea1e5226587a255475 SHA-256: c7f9f245cd6d9b9fd86adbf5a041cb231009ce32eb9e2f0865fcaec551411e3b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall detection strongly indicate an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pawsandtiaras.com/ckfinder/userfiles/files/wejaboranereforanaxen.pdf In PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a1fbb1af9---dazotatogixukexa.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9970693a0855ade0f21d39426666fc71/95706599138.pdfIn PDF document text
    • http://leguido.net/files/31008751034.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/oomrfsrgijnn8v2e6u3j346jm4/rufegutezuf.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d94a07db4---vigoxujinusik.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609003587d8d3---85273740591.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/17d3ce8614212b4293f1209513846f34/zusewikumumegojez.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/dezujeje.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/43147237856.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b61934fa7---zurofum.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/8b809d7cd21ab2ecad9b4c8c13f3950d/vugurapopafav.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/qesons03a8s8ttdh73p5pot66u/bujimozumit.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/72025852232.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52eca2158---31728883860.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/hs9krcmop11sfnjkjbse09j9rn/64904146961.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ch4shl2t3f62kfiihjt6gqda71/sowimofasobelarema.pdfIn PDF document text
    • http://sparkpro.lv/content/file/49023450591.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/45237730740.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa38c3e1f7---sutuwojabutemitolixanojad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=naruto+shippuden+ultimate+ninja+5+walkthroughPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 17840 bytes
SHA-256: 889ecb7994130932a81a899158c75ae7c930e8d81811ace872c8438b9c0c99e7
font_01_sfnt_off0001366c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366C 5536 bytes
SHA-256: 3694238367a98472b50c640423812ca7726e46195844c2c0b2cc4e95edd47bff
font_02_sfnt_off00014abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ABB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000162d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162D2 11360 bytes
SHA-256: d7713f6e65e90dc67363d3e9bfbcacd50baaf8208b96a2fac73a7fa1fab5050c

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