Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2ea311f06a25e1…

MALICIOUS

PDF

89.5 KB Created: 2021-07-05 06:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8c8999ed9568dab51bd72c47ad611ca0 SHA-1: de313be42c32a3b29dc290eeef3b3b5b66f4fc0c SHA-256: 6e2ea311f06a25e15a3686ef84d4c224eb4fe8c8b3a3b7c5572ff54264cdcf5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on compromised WordPress sites, forming a link farm. This suggests an attempt to obscure the final destination and potentially distribute malicious content or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/a86632ef7a42e5fc1fb5219008563c2e/sekaxorigefijozafejemo.pdf In PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607095a1a7906---49972689462.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/2ce60037f3d3a9ec5738e39ed74d16c9/venaxunajaw.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b422d24498d.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/982hmccvlqdnqqf490u0i17ih0/23655072577.pdfIn PDF document text
    • https://thietbidiensino.vn/media/ftp/file/denegejepevomenefodikaw.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/g25senfr9iiv2ve7eeccgk5ce3/10999987197.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc606eb348---lorubab.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b02b93404fd---xamokewaxekisunuget.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/4d3ebf3eb640e926322d128d2aebed68/12856916363.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/8e350f9c0d63bbe6337f9a198fbd4c44/nupewatexuteletetomuf.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a1da421b1---12412051651.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/63595118625.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbea61892d6---rekerifojexolosurosotasi.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/legudiwir.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0e4455300---mavusuzojakoxig.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/13301371105.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb34783ea---naradukeletumaresalajar.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160de0f44349f6---41012466481.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/6d2fa0957835180c453d063ad497f3aa/75432031981.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/55770031197.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/93122563521.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/p0o4r0sgr0oho329rcdfrad96a/15196936490.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afeb5c93c88---36295405320.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=ice+coffee+jellyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF67 9800 bytes
SHA-256: 1411dd9b070d9b0607a5e8c31b2eb627e7e13ad24f25eb105209d139edd70d71
font_01_sfnt_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 18576 bytes
SHA-256: 2fd7e7135064dd6443c90abce5ece6bfbf062036bdd62f49bbd1d245215b67bf
font_02_sfnt_off000135c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCF 2048 bytes
SHA-256: 10a39f537f51f2ecab3b896aa910320cab84d7c7cee702d885a528bf2a1deeec