Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e09ddbc3abf85b…

MALICIOUS

PDF

81.2 KB Created: 2021-09-06 11:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c570043a05e289a686671c174ee765e6 SHA-1: 557af1d437aa9fb057d790ca05a2b1481fb0bc7b SHA-256: 02e09ddbc3abf85bb09100977f9f473b094ce2e07f20f9f4d6b87f18a729b49b
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 CMS upload directories or disposable hosting, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or SEO poisoning. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://pistant.ru/uplcv?utm_term=zero+belly+diet+smoothie+recipes+pdf PDF link annotation
    • http://avsa.org/sites/default/files/images/files/44707313095.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/25980977923.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/2295933344.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/27546873139.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/nuxifupirogizezozuk.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/86759776cdd50d78833fdbc6b5f6b4c5/34212884252.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16102c189cd99a---kubugabuk.pdfIn PDF document text
    • http://coumert.com/images/file/48025064546.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc1796cae61---73330682353.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/26325914896.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8cf58e76da---1885011748.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/56759069586.pdfIn PDF document text
    • http://szwygs.com/upload/gotaferuxalolemegeludapu.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/vezalowanadekuwefumori.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ea95v7oj7m1h77ni16kap5h173/vewuliwe.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/17990619794.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607912dcbf821---zifinapugiwusi.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/82991656252.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/23627716827.pdfIn PDF document text
    • http://www.motocams.cz/ckfinder/userfiles/files/soselo.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/78874540677.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/lamigixonovimulemimamon.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/i8r7s4lui7ooj325hiifkeavi0/xexejezudeligasomodonoguz.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/27181057002.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/in4ucr38h5epas7j4c1us3stpk/23410286973.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9fda45bc5aba124644415ac9c332e61c/kofasepamifusibegaki.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_off0000d6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B0 10836 bytes
SHA-256: 76c6fc3d45a52c0fac5e89d1c5c5b6a3fe0778b2902acc4c094b4504899bff83
font_01_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 18392 bytes
SHA-256: 182fb5857a2d8b7b40c6c22c6f6f2763309127af8a7c8288018ad8bc3eab2af5
font_02_sfnt_off00011ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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