Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe3b07d89c0c57f…

MALICIOUS

PDF

101.4 KB Created: 2021-09-07 11:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: edc8383bd96cd375c2ddf31c4a6badfc SHA-1: 2b549ee3fc744d85ebfdbb4003664da66054954d SHA-256: 7fe3b07d89c0c57f45de3513d1892f892133b22e543123b74ae736d293ee23f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://smidgel.ru/uplcv?utm_term=biografia+de+los+jueces+de+israel+pdf PDF link annotation
    • http://dekobonner.de/userfiles/file/75119752466.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/92de1564b578d1d7f28b1fdd47994b73/bijifun.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a935540db---letetibimenesodizapowuji.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/7e4045399a6afc34e02d55f9045ce8aa/81915559571.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160775e987a397---8507868918.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/89ff2dba2065c9f6db1a4fa2451cde1b/xumomewodeleladiwebuse.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/midijol.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/4b8c741c0e2e6b4a6ecdc4c53959c76b/52443370510.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/d43363c7f7cac3c4a309244e44949dcc/99464948896.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b746bb16d0---luxutemukimudirotoke.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160827c301a81e---3748201159.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/90743373222.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55daa81900---6725533474.pdfIn PDF document text
    • https://argumentua.com/i/file/fawiwodamapawananolo.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/96550458454.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb0a1e4d20---37343605310.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/bilifegesovuzajajetekupok.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9d6b76dc---pulopepusenebobel.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210809_9C7D09F36F372963.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/21720327663.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/47732670848.pdfIn PDF document text
    • http://info56.ru/userfiles/file/1560701432.pdfIn PDF document text
    • 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_off00012216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12216 21228 bytes
SHA-256: 6c9319efd6d5e9cd2b3e36400161805ee17a7be19c4ea1b91a73611cc1d0ad3e
font_01_sfnt_off000156c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156C2 10876 bytes
SHA-256: 66174a467684cb8ba55ebead7c3560154901fad29969d8b8b11c721915b9e8f1
font_02_sfnt_off00016fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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