Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f46635825d6237…

MALICIOUS

PDF

102.6 KB Created: 2021-07-09 05:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77fb04a0cbe60843844447e8a8372f64 SHA-1: 2a657b5cff9de21429a0ef54024048b16837b7a8 SHA-256: 07f46635825d6237b042e287429b0df7769c4fb6fe5a6b7720a0660b2933c375
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting and compromised CMS uploads suggests an attempt to obscure the final destination and leverage vulnerable infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://chcial.ru/uplcv?utm_term=father+and+daughter+erotica
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/6dc1ae1545e591c50bca41affb75716c/10788487443.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8e495db64---73515191335.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/bipuvagozimutifipub.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a015a4cbb23e803f5b5bbe0ef1390e13/38113036363.pdf
    • https://proektasis.gr/admin/spaw2/uploads/files/61779299523.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7f2e0029e---6605070809.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d72b4fcab---7030604476.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/10d7a64e19729b9ab1380c6ea459fbad/dujedopazo.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160be92fa494cb---gegezomevotativizex.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/u8j3jbuar2ka3mm1rlgb36kdl1/91570914621.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cab693bf2b---74871971072.pdf
    • https://deesudcoolingtower.com/userfiles/file/74031604332.pdf
    • http://tahi.hu/ckfinder/userfiles/files/fotitevid.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079a31ac4628---mojisututisivulaxisedi.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/snhjc1on1hi5k2fqc4pe7eo0p4/37326129722.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/u5tk0fovuu7tk0qpt5rf8dt9sb/xesobutoxolofule.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59cd1aa892---28154921744.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec392be609---kewenowemigojikopegupuj.pdf
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/mivex.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/bc4f8c769a3da0bc968761def2b99807/95277471527.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3921b6b2f6---23451382468.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160baf36fa5fc0---24238635794.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077cbe1d3c3a---segajid.pdf
    • http://skolicka.eu/foto/images/file/98687626279.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_off00013036.bin
6c47d804cbb1297d36ac4861f5f394d58a4774f8899c24a5794898939b0d8ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13036 17440 bytes
font_01_sfnt_off00015d66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D66 16792 bytes
font_02_sfnt_off0001757d.bin
fbf6a1f4aa4552e7d0a071b373c3b407fcbaf9924f9e9f3894432684fb363494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1757D 10512 bytes

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