Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca0fdb927cd48e9…

MALICIOUS

PDF

85.9 KB Created: 2021-06-27 21:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5730f447b2ab62a1dab6f135929153ad SHA-1: 161a7fffaf4a497778e0ec8ede74d9972612435f SHA-256: eca0fdb927cd48e9fc763945805500822304099382934067ffbf520a2a50b63f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification confirm its malicious nature, likely for phishing or malware distribution. No scripts were extracted, but the URL structure and heuristic firings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://philabc.ru/uplcv?utm_term=lime+green+spider+poisonous PDF link annotation
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/rsso8eibcm1l763qfqevrjosf8/bomejujokora.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/pejanule.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/27843887066.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1272335d91---molilaj.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5c7b99fa8---71745193152.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/42450145d392d41eb9645abb4a08397b/japenarodeponesebo.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/06/27/7804233786.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/gowujadidejutoneligate.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/54710354994.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210612_09FF661BAB91BADC.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/005d40bc5f1ecff5d5cb07b4553500d3/filewifeximabas.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/xenegogaxetezufavaxu.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/wagugerikijilusozamurimu.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4a60838e5---62400422481.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/berofajif.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/xukites.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/3844596478.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d42642d856---tibubavulijekibomiviridon.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac941907648---rivadupozolelojozex.pdfIn PDF document text
    • http://tms-operation.com/upload/files/jofizenojazizojiti.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/3r04ajcv5u2sq4cvdnekfnt84g/nelonilaxi.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/33950440484.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/lobaxewowipudo.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/vobafafazakilokigoledum.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609432864442a---rurubakusud.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/3c6cbfc4d4ae5141ded8d5c4bb5e79f1/63124366992.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/cdr64ndknroigffaf0teju5b3i/64225900099.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf632604de---bewerebo.pdfIn 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://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_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 16448 bytes
SHA-256: b3d37f315fbd5636ee1ce4e0b93931094feac335e6d9454e5a832cc3388dbe46
font_01_sfnt_off00011ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB0 10488 bytes
SHA-256: 5fb53c294decbd10f0f72aa346a74c36d1c1120db1fe1edc09cf8ea9899ee8c4
font_02_sfnt_off00013232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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