Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ed09daaf17e6a2…

MALICIOUS

PDF

84.6 KB Created: 2021-09-13 21:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ffa0c7283ad1a6fef30230096b13fe9f SHA-1: cfbb298a16768332531b8a3e5ff017c182bcb7ac SHA-256: e7ed09daaf17e6a2863ffb5a661dc9dcf270c643f6fc4558662891ec9d75be75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://webinaris.blog/ckfinder/userfiles/publics/files/mebawutipizakiwulejot.pdf In PDF document text
    • http://naturpix.ch/cmsimages/file/fudagisenik.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/53186136168.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/zemabiwasedakib.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/65869475603.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/vituzasularokopif.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/16988172146.pdfIn PDF document text
    • https://beaszemin.com/files/33180704286.pdfIn PDF document text
    • http://kotolantopeni.cz/file/67724148783.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/91117450401.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343d5156445---buxefutiwek.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/29159033664.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/zulaviwutifesiminidegol.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/69676739227.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612efe48617c3---8199385406.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/vafufawifuvakofami.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357defc815c---21636043540.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/28758562077.pdfIn PDF document text
    • https://faceless.me/userfiles/files/zipuwobubuluj.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/roniravodititaropaje.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/4d2472ca4c62924e7af629857d88f4e7/76683648915.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/46816685196.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/70022875364.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=bedrock+minecraft+hack+clientPDF 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_off0000e0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF911 19676 bytes
SHA-256: 916e9c95d108aae1898dee536aeb4f31c329db99e9efd32d56b7f07037cd3363
font_02_sfnt_off00012c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C48 10716 bytes
SHA-256: 091740b4ffaeaadc879c443345293d02a336f64bcfb31da5c460be962d1a5a09