Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e2a24b94eeb940…

MALICIOUS

PDF

87.5 KB Created: 2021-09-20 09:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9139765d93fcf8503a17cbbc80a3171d SHA-1: f65dcdca46d317bc9ea71a6c810eed16b9784956 SHA-256: 92e2a24b94eeb940e6fba5eb95f8f56a0967d1b68181b21d227d5b73464075cf
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains multiple external URIs, including one pointing to a raw IP address, suggesting it's designed to redirect users to potentially harmful content. The PDF structure and heuristic firings indicate it functions as a link farm, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://tenutaedone.com/filesUploads/file/22463934504.pdf In PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/53199079495.pdfIn PDF document text
    • http://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/fobekubilevavuvoxa.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/26720158849.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/57736641604.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130a0e017588---40775751831.pdfIn PDF document text
    • http://recviem.ru/img/upload/41618862101.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/xudorazu.pdfPDF link annotation
    • http://dungcumaymoc.com/Images_upload/files/42232854129.pdfIn PDF document text
    • http://bastola.org/userfiles/file/vebedo.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142725793f69---97629019650.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/82165792694.pdfIn PDF document text
    • http://agmapure.com/upload/files/sakaromagijelepi.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/xaleweropurawepuguv.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/lapafazexinerigunowolamun.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/rivuxarewebutirut.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/4679492719.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/74681218655.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140849d0a6e8---jipegafupomamawifuvumofa.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/18910599453.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/pawepozes.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/zanaru.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///mojiganomoradego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=twd+world+beyond+episode+11PDF 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_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001068a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 10480 bytes
SHA-256: 2f6aacb9308ffeeb3eebe440b59d60ef8281811df1b79f780444c353709206bd
font_02_sfnt_off00011e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3E 18380 bytes
SHA-256: d80067431e22c5016e8ba752bb4f14ebe4a6d178e3b683cc7a52d2d80a29052d

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