Malicious PDF — malware analysis report

Static analysis result for SHA-256 9500b36847cc28ae…

MALICIOUS

PDF

70.1 KB Created: 2021-08-26 11:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6b6f33a39b6d0237489b98e9f1f7d2f0 SHA-1: eb83e2387424a99b16c82fb56d65d5a48ef09c0e SHA-256: 9500b36847cc28aed31c96f0d175cd8a3bd6e062f74e2ca202c24604c1707112
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 it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links are designed to deceive users into visiting potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffe1ac64e6---kirapopakovugepew.pdf In PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b64d5fbc0f3---84571286010.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/volenud.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210714121633_ahz2r9.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/mosixupepowi.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/72d99d5458545343824dcbf52ccc88d8/31830421542.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/94617167117.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/10757274361.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/u399u0sn5l1il9r9tg084m9dp2/46900168103.pdfIn PDF document text
    • http://doer-sh.com/Uploadfiles/files/fubore.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/porojojuso.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/pakiwugegumivupuwe.pdfIn PDF document text
    • http://etre-belle.su/images/file/34562543615.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a657f6077136173cc616d3484e4ea326/tumava.pdfIn PDF document text
    • http://philipsphotographystudio.com/72523144807.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d6eb50833---64048730851.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/rapupijoroduzewarutorunov.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca049a855dc---25551419757.pdfIn PDF document text
    • http://odumakus.com/uploads/files/6173878126.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be0d8aee427---8984215951.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/61525690542.pdfIn PDF document text
    • https://dineflon.com//files/daxewep.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/82772844856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=definition+for+bawlPDF 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_off0000b425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB425 15420 bytes
SHA-256: 7a2e2e31a89045c1bdda3922307a7e1b89f18ae7135ad09a98b97835574677dc
font_01_sfnt_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 10268 bytes
SHA-256: b872cc5ea409b54bcd010f50fcb38aa09993876fde5a3a1ae07097ae50db9ebf
font_02_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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