Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea6dd18a223b4e6…

MALICIOUS

PDF

91.8 KB Created: 2021-06-28 04:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1534b7b6c707c7dfb5f394797bc8acd SHA-1: bbcb559d9ad08726194e483f91947bd1e195e220 SHA-256: 2ea6dd18a223b4e6634b414ebb67dec9b8ed56e6401192f661b504f2f0f95069
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crysiq.ru/uplcv?utm_term=abs+split+during+pregnancy
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/994ffa3f12b638e2b53603a693cf1eb8/siduxo.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/ca22b06fb7734c270688cdda941fa3d7/wezukunividadozogesidog.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/103043ae565af6cc2367cd5a9ea1bb82/wizunerido.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/q4bp5t0u2tq67adj9htjh09vqc/37373098904.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/5925448e99868c559f993fbfc6b17662/xanevozoxob.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160be6cb047831---63532487179.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d70c486108c---rimijowo.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/darmea72fbneq3jb5jd3h9fc3h/6720141335.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609732660217c---depejulasipexoniguj.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b436ce46c2f---81787579209.pdf
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/pijitelagizegilexexafav.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160838fc42d000---kupumilegiro.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c1be69eeb3d---zasege.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b77dcf31826---37122417697.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac88154a5bf---zamojela.pdf
    • http://anandtouristcorporation.com/uploads/nutaguxafivivi.pdf
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/vimagagive.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c35432377---dilused.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/nsicotmobgj0qn3ab0tqle4bf9/91756487459.pdf
    • https://thietbivesinhanhhuy.com/asset/files/51521201783.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/n4a3867cek5bce0aq8dtijstnt/zodoripubaduj.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/g23u5vtobuo62kmf2ehgp7ldb5/vadujuzawuruti.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c81a5528f---gusanebuvosone.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cb5e7b4ce---85225185411.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_off00010455.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10455 16792 bytes
font_01_sfnt_off00011c6c.bin
2c1c91d532a2994d97b2b1bc9d6986b66e9c836df7fece2450f82576f7937faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6C 10904 bytes
font_02_sfnt_off00013558.bin
9b1a7876ccc7eee008daa600de36a4510236a3808d7a87a4d1f066b24b8a6a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13558 17072 bytes

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