Malicious PDF — malware analysis report

Static analysis result for SHA-256 039047da2e95fa45…

MALICIOUS

PDF

90.8 KB Created: 2021-06-30 02:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 663b8dbcf411c33b21e5b51c6e1823ae SHA-1: 1a2bbae99e9dd050f1e9d08184cbc45b73d149c1 SHA-256: 039047da2e95fa4538e4687bd1c611669c5b4623fde29bc8785bea283b304f2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://nomylo.ru/uplcv?utm_term=how+to+introduce+yourself+in+a+college+interview
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa42484e87e---60284999342.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc50c62a8e---57088169044.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb661cc4aa---pagulowadesewaliruri.pdf
    • http://alarcon-v.com/editor_upload_image/file/9081332032.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609896431d061---12090595567.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/6a7a7944ef0341b85aed47dc0f83c0c7/47727546219.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e765a062c---93464542511.pdf
    • http://hncastlecable.com/d/files/92906002403.pdf
    • http://dges.in/userfiles/file/42444000969.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c395b2b97f6---30104709467.pdf
    • http://aire-limpio.com/img/editor/file/57350333084.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5787b3297---85122276024.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3e6d0b5b8---40328078672.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/293fe7f6cf8c637ba94c9fdc5681bc27/zujavosoxabageda.pdf
    • https://protrialse.eu/files/files/13331697689.pdf
    • http://bluefield1966.com/clients/26642/File/7986052783.pdf
    • https://csodamalom.hu/files/files/somovegugiwopowebesulo.pdf
    • http://takemehometomatoes.com/ckfinder/userfiles/files/39440071585.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/2f5a03415a40d3d9337b5359be266c93/35974020612.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084fb73b2fd8---bevurixoniwew.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/9ke7bdck8o4fvsn1ksi0a29tk0/kegapopegodexajoxufe.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abe171897d4---32061597005.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bba2e916135---buwanifodomadudoma.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfd90a88bb---31014270787.pdf
    • https://hagepoorter.be/files/files/ruwawinoronakuxoxali.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd2c.bin
0fb2d64ad77fe457e6ed918c1364811344b3fabc50f5d12a1232e4d5e124bd07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 17276 bytes
font_01_sfnt_off000129fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129FA 16792 bytes
font_02_sfnt_off00014211.bin
45db6a22b9d9b115f4029df5865bf4a66474af8ad9ae695b6fd40d610a9cf8f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14211 11008 bytes

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