Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ce2fed3600252a…

MALICIOUS

PDF

89.7 KB Created: 2021-07-03 09:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ecd75d95e3edcfd93eda1bb3f55543f2 SHA-1: 42cd0ed5b331128de3263a76a21d1e69ced15cb3 SHA-256: 60ce2fed3600252a0a1c478424485c27fcf6279b6958845c21a7fda11f58dd02
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f08e88e063---84538531721.pdf In PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/fitoxefu.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/544e1fe15f5495780a0df96931b7d9d4/xusivatipexagikadowa.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079066f5d1c4---90822337961.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4b71a4c2e---rifarunuroropupe.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/54067590270.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/18233924368.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/gifupilusowasavunex.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13401c4ee---7619556034.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/e5cba0f63f517c01e3f7a24e8e6b6779/63206991132.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/ruxelurivepebelajoxonuni.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/7233250069.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a10778ccbc---dekejuguzofe.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/petagap.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094c8cecee25---wudupebefebelexusisedu.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbd6eb2dbe---59814099027.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/bisokegobupuxavijinojaxod.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/75712317456.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/51159328597.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607789506fe0f---dugodu.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a2905807be5---43931310234.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988218ed138---40328744274.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/bd895d3fae04b0ebfab049c7da1d9b6f/xawivuf.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/nerudotubugivaviton.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/migemudebisabegewafefib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+many+calories+is+one+glass+of+winePDF 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_off0000fc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5E 10772 bytes
SHA-256: 52aee24fb6738d9fe0b314f2b541662eb978b1a7efd3c188dd3d84d3cada2dc5
font_01_sfnt_off0001152d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152D 17028 bytes
SHA-256: 492c492189ab690155992e2ee094c3ef5a36fb1a803d35f7f22798f44856b01c
font_02_sfnt_off0001411d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1411D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1