Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa79947ab1828c0…

MALICIOUS

PDF

70.7 KB Created: 2021-06-05 14:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4d4f938c99f8bd37b5350c0b49092418 SHA-1: c80327536c1a8b38e3327de51c0c9550c5ee6b4a SHA-256: eaa79947ab1828c096ead684e7943ddcad2ff468365030099c0f6948efde0c43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://coretry.ru/uplcv?utm_term=toca+boca+life+world+free+download', are used as lures to trick users into downloading further payloads.

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://coretry.ru/uplcv?utm_term=toca+boca+life+world+free+download PDF link annotation
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607be69f492b4---mopip.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/9759267396.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1eff2b9b4---ritukumotoxunusa.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/jaaveq0745n4cvp1fe980eirvq/nelixuxi.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fedfc12bd1---fevatuzegida.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/6199899444.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/83235460253.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd4a6b8552---71550303066.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608761a5aafef---48931588410.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/bodofifosovutukepuvusem.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/de38e71ea0de626910762637b104b191/zomana.pdfIn PDF document text
    • https://seerupit.dk/assens/file/kevesemivenelovunenot.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file/%5C/91050620279.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87A 5020 bytes
SHA-256: e23c54f0c11393112cbd0a1efd6ffb1e2680a9bc29fa1efb81437ed23e9b51e8
font_01_sfnt_off0000e9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AF 10604 bytes
SHA-256: 4079d92fb28d65907173b0471cc7e1b262fae4da909253dd0c9676b5c242fab3

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