Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07c3453a4e8a86e…

MALICIOUS

PDF

88.5 KB Created: 2021-06-29 09:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fcca60bec1a11e389635ace13b0d52a0 SHA-1: 2fb1a18d4a666d56e8afc5926559411639410634 SHA-256: e07c3453a4e8a86e1fb47708f4ad4e981813836bb4256640264a7e0f75625965
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to external sites. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/basu4c0j4tfrm6qe0cvgljnf2g/gojajodopuxapareloto.pdf In PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077173453eb7---midapulibov.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/kijoxovufow.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e923f684c363c2323ad64387a70c574b/wodaxubanajobewuzexuril.pdfIn PDF document text
    • http://poornasreehomeoclinic.com/ckfinder/userfiles/files/52841124182.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/68728312583.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/25987299242.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4959487281---tubupoligow.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/uacqsqcps3csvhkjancb3e4tp2/68920451079.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/buwibipuni.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9841f2fe5f---61152269758.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/baa902a8ea010c94a2ca7633fdb7ed90/65556903711.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/73b85b2602e3e2950106b24a5ef3428d/giwanem.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/lisulowolozaramo.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc865833d---69908002682.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab7d99be44---wunexopinowomelik.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/29755770956.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050214015673499.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/0vku9tlcrmdpti9o1v6p2klhnn/zilodonele.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a02af518730---55011717011.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/62838839565.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e608867c49---15540229290.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/fijejedozesoba.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/97912079624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=black+panther+the+story+of+emilie+and+jacob+2014+watch+onlinePDF 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_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 16208 bytes
SHA-256: 2f3fe951f676449c007eb4943798298cab6c0f5d949777e196d05408b3292a1c
font_01_sfnt_off0000f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 17560 bytes
SHA-256: 486a32fc4047ddd94195f093b9621635ac79ccc1b3e68d0d76e5496bdccf0a3d
font_02_sfnt_off00011f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001374d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374D 11872 bytes
SHA-256: 864a5c108bddd47c3cd0710a07a5aefedafd54777819f8a76baff89672c7d01f

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