Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2f49e5dfb35ef0…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 04:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 68a1024df388e01a543eaecf346a06f6 SHA-1: bbbe39f33756b0d3249b7491b40066e22e4c0a03 SHA-256: 5d2f49e5dfb35ef013d05b2ffffaf9b36343b4285863ab07b83c8a2f50e5efb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to lure users to external sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e5404e62f---80687591614.pdf In PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161182f06597e3---waragevanugitosa.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/notopinutiza.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/54872698940.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/34886899615.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/ropipepexokowinibezi.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/0b88a4f03936e8afa0c7206bd57b4d6d/wolibogoxofasabofib.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/52163037205.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/882152649.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080348d02ed8---94607909293.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/2v8aenvu2c2lpgid20q0lfq1ba/14841923710.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/4bff42d207e51ee7a8b650e7e0ebd19d/jilatisavime.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b41235f82246f268e350a635a564f1f6/60116338297.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/jegiguwozepov.pdfIn PDF document text
    • https://eslms.com/userfiles/file/fegosirumedefixapoparod.pdfIn PDF document text
    • http://prota.ru/upload/files/jawutijimebuzifezobido.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210627_099599F7DEB6F2DB.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/vigulakixibewigagij.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/0097a1e2cace62beaa0d7850e5402773/fovezesagag.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/2d89e3ab7d479b7fda170435a94de5d2/52278593004.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+new+encyclopedia+of+the+occult+john+michael+greer+pdfPDF 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_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 18448 bytes
SHA-256: aa1bd5e9e4e5190f8c9fa7fcc4251a84aebc4d0bca51f276c898487cd81af266
font_02_sfnt_off00012b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B96 11292 bytes
SHA-256: 667a5658a79de22b432e9adde52455d3d8e6785684ada5c0d01fdc79e3606eb8

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