Malicious PDF — malware analysis report

Static analysis result for SHA-256 9312a363197ac52b…

MALICIOUS

PDF

85.1 KB Created: 2021-08-17 00:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 785c3e8e9b14a84bf816b1a5378f91f9 SHA-1: 24f2bdfe6d8d000b43c9805a81242e53147a94db SHA-256: 9312a363197ac52b3f80573abae4b1c7988ee6806050f034e116783c83a4dfaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple compromised WordPress sites, indicating a phishing or redirection attack. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and embedded URLs point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/2e9guorn1480jg8ggt73pom19v/49513633324.pdf In PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab69337a85---346247864.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d3fc324b5---watafigigepilafa.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/10898568912.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/1be31b3e761516a45cfda05923fc55eb/femenuzumirodu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/pmhgrvpk8ujn72137bj5f941c3/12996003206.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098a94b59ec8---74770052078.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/6jnqcd2bouhmarha8tf1n16l47/69513521803.pdfIn PDF document text
    • https://asiabiru.com/contents//files/gilirigulukotuligesuku.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021060620424573499.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078a7f5be6b1---wiwolob.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/wexut.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/7623173904.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/a1a79ca5196af50813991045f7a3548a/15094048361.pdfIn PDF document text
    • https://alutat.com/data/file/11630777295.pdfIn PDF document text
    • https://tavio.ru/files/file/9864519341.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/19468333629.pdfIn PDF document text
    • https://suksesunited.com/contents//files/14080099678.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/1o0l0lnnmi60rvm28fvbb2377s/joledawonawenavuxewobu.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/5336685eb98eb8121a197dd341e135ec/16605764743.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/duwopolefepelajero.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7156b2e3e---papawegazanujukogonomip.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/ditagel.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/tewewijivakisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+use+sq11+mini+dv+cameraPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 10924 bytes
SHA-256: 59af1e11bbc6056629cd27877b4a000b37dc64b26ee93668656188ee25708113
font_01_sfnt_off0000ff1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001172f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172F 17700 bytes
SHA-256: 05b38d8195550bbe0ff770f599ef2e818dbe27839b402e10c12d603334dc5d8c

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