Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edd1d4bd8cd0cea…

MALICIOUS

PDF

77.7 KB Created: 2021-05-06 18:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3881e6fdd974d30f03a7980275012781 SHA-1: 723994e40ffc9facc10827f5442fcc7e66cb2bd5 SHA-256: 1edd1d4bd8cd0cea029705309b9bda5be9bc571f653d449bd805ec6059fbd404
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/ab4a5bc201cbbd966853dca0b2740101/29617089428.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7e01c4e03a6e0986fc1a11fb7ff50424/27772468801.pdf
    • https://communeouchamps.fr/userfiles/file/tobumidewel.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160726b8c8f7af---zotanirazadoraperiwe.pdf
    • https://ancoraeducacion.com/images/fakumupesog.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607788cb63a7d---bimafumixasipukinu.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086472e4bc30---bagewidemu.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/o0listf444eu9kr8qq56da835k/86666103672.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160747d6f21cb9---bufilekepimonupiperosi.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/89c63a9dcb8110044b9eb3df171d642b/kasisodudalexase.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/8uq2gcfle2a1rq1i5v2mk8ksm0/jisakonokevobozonokazida.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/gdnv1i1v5u1hd6prvsifv134gv/tirurojez.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/83f2ba6b50e4aadedb0bec1b54d205c0/34938167923.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607909c5ca3ab---zubunoxolotetug.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607577a1b1b9e---33070715873.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16093adfa93581---juzexenisujit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=brazil+team+1970+formation
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f222.bin
9b662d305054494ac44820dbafa402c08ea8fa666fb8f776415539e539d90de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF222 5264 bytes
font_01_sfnt_off00010403.bin
93fdf9ff754f493e80a984c93f31355cc403a66844e926bfbb6e69142e8c0334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 10804 bytes

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