Malicious PDF — malware analysis report

Static analysis result for SHA-256 7627d250df9abbc5…

MALICIOUS

PDF

142.4 KB Created: 2021-07-02 14:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d7a64a52946f4b4b2af27b04e113eda SHA-1: ad916586c6164c67f0372f2b1b7a4f1c3a15481e SHA-256: 7627d250df9abbc59511e0d95910bf755363c25ae15df745e7e21495c0786a11
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of numerous unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9799

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://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/d8bc5ba7633f9a9b89f4d9ba5dfdeb34/linanilatisebutipebiwe.pdf
    • http://liddellgaryfamily.com/clients/863293/File/64355371258.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/3t62jbbn47q22p5vholhjn2m77/8132067641.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/207332393460daa2ae958f3.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdd08e1de0---54430261979.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f8073108e---kivajimumanimu.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2c2dc0ca7---mapinofigiwebaguvez.pdf
    • http://candientuvibra.com/images/file/vemusefikaloxobikujetalar.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc5432cc3---33793368470.pdf
    • http://jjinline.org/file_upload/file/zitekixusanilimifodaf.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/53659c9e66c3b74ed55bd5d6e194208a/41197937353.pdf
    • http://amuseonline.com/absite/userfiles/file/mupozofokilusamuronolaju.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbfe24f41a---22795009732.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/n6oqb8qn8ong9dell4noh9dai1/7939972598.pdf
    • http://k-souz.com/userfiles/file/vonetisafejusupelafoma.pdf
    • http://huucodatlanh.com/userfiles/file/vewibesokosafidijiguzu.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4b21748c6---wojuxujudis.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e1b53ff5f---32246790693.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/d8010ba45222fe3a17e4f47a4cbd38b1/sukuniwe.pdf
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/pupezire.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6691e2900---nazubovusodutipujirefevo.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4925a3897554a128f96f64558645f57a/659310810.pdf
    • https://bestofbucerias.com/upload/file/90465966159.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=vmos+android+root
    • 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_off0000ecb0.bin
bdaaeed5e5956a65d47450bd4b986be029d2665ba0f5fcada496449e573b8fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 17816 bytes
font_01_sfnt_off00011bd7.bin
a662421a06dd9d84ca5d837cb51a16f776fce7c9f51533c16855805afc43803f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD7 89220 bytes
font_02_sfnt_off0001fb20.bin
6bafcbae2b8bb309c027f24f69c50d685fcad99b1c81d360b2af9546a2ab4114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB20 10200 bytes
font_03_sfnt_off000211f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x211F8 16792 bytes

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