Malicious PDF — malware analysis report

Static analysis result for SHA-256 42587287ab4069fd…

MALICIOUS

PDF

81.5 KB Created: 2021-08-24 05:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 71b39f7f20c62c239b9a83560961aa93 SHA-1: 9e045d4476014744f5854f251275c4b60b938f05 SHA-256: 42587287ab4069fde53c0779402732926d6e8f4471874d0d16b0f164748e5fea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/j914siflhcdlt6btiuv7cu0ne4/41205957275.pdf In PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/bctjeg9ue7hqtasdq93kv0afv0/61593146499.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/93877793635.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/74730206144.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608248b69f5d4---wubexuf.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/36787154686.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161131090c1894---13767025908.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/6m90pd2t5de99cdgggbgpcj3ob/xedafidadixokigawejekedod.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/97996667671.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d204efd1cc4---jililirenuwitegedakorexa.pdfIn PDF document text
    • http://congtyvima.com/images/Download/8478486442.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/4vr3snmvh368j15rs8p4b3jqv0/30120650610.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202181215939.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/28342937152.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b56f001c22eb5c571b85a1d948f6a917/70485319955.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/jejojekobaketiko.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/13502674189.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4610f585dd---88376712137.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/gagulosuwupadezeti.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/12eccae30e71c9cc1f33d16adfa1a719/24895769669.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/51704551743.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/jabuvisol.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/0bd0544f5cb8b2c3d2a54f4f98fa5fa9/tudijejele.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/fewoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+lcm+of+6+and+15PDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A2 17304 bytes
SHA-256: 415b0c150e943ae43e29b86e356108d4f173f2e0ed127f59b893d73326dbeec1
font_01_sfnt_off00010769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F80 10600 bytes
SHA-256: a693be429973ed166468f7ff304704d51f9b9e9a74c8328c07e3b6b8abe6a515

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