Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f418a1c188856fc…

MALICIOUS

PDF

95.6 KB Created: 2021-08-11 11:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8be5d93bab6aefc4f94596b5449598dd SHA-1: 9a412ff8ab8a5508106e4ce6239ae663e327d841 SHA-256: 7f418a1c188856fc85b5ea668d2284d2b1b25ebd2baf137f03e75e53df7c3bc8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URIs, many pointing to compromised WordPress sites, suggesting a phishing or redirection campaign. The file's structure and numerous external links are indicative of a link farm used to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://drafthe.ru/uplcv?utm_term=corazon+salvaje+capitulo+57+parte+3
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/nlaijq9qe6c1s684p0mj5urss5/40264571624.pdf
    • http://c-six.it/userfiles/files/26477201827.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160aebe5f99dfb---bogarerobupomave.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078c1be78858---57433813976.pdf
    • http://magnachip.cn/userfiles/file/20210522144219.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609469084d8d8---39552742198.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1f1b9f11a---gavarunazobebojib.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/2vjf3e6qo6778mn491m5okn6l1/sivavanej.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/6e0n3r7ioj2maavktk1igbq4g2/36077014913.pdf
    • http://palaciodelosnavas.com/userfiles/file/87619013467.pdf
    • http://samtekelektrik.com/files/65825741799.pdf
    • http://eko-uklid.com/files/file/jureporijelusef.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c21d779766e---5655577995.pdf
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/vutol.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981cb0144e1---46950369439.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609296d6a36d7---41350797339.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/016fd5337993f61728e789537170b6d9/55452945797.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/d24a50lsrkb0o6flpnrta9p333/toperipogosebemasakelag.pdf
    • http://jhferry.com/data/fckeditor/file///81602951487.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb8b4b0ced---37784563416.pdf
    • http://hainescentreasia.com/images/file/54909703364.pdf
    • https://aljazeerahdrilling.com/userfiles/files/25027206470.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/ugg5dpadtvgblthnt71piljm04/jezafumilututemome.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607886864f14d---lamotovisosobubufexasal.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/66lb69eorlpq69v1n2i6lg35i1/61485813713.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/tu0hnc63mh7m555hjalmssakf3/27913388608.pdf
    • http://capitolmetrophysicaltherapy.com/files/files/kedisisigaze.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0fc.bin
3b3a78ed2f7d13c4471b97ec37b27b04d1807b8b9a2df7b58d33ad19c4be7fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 11108 bytes
font_01_sfnt_off00010b2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2B 16792 bytes
font_02_sfnt_off0001233d.bin
76ae3197a2bdd6cb6f9eb530fcb56c56225800146f9113ec9c35de687071c67b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233D 21492 bytes
font_03_sfnt_off00015a68.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A68 16164 bytes

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