Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fef1a9e46d422b1…

MALICIOUS

PDF

160.7 KB Created: 2021-07-06 18:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 40ea9b6dc85faf7294d8f546299bf007 SHA-1: 9e7e4eddba6667a93d3d32d4505074c13c663ebf SHA-256: 7fef1a9e46d422b156f97f8f307f05900a775076a9a2ae7ef36c37177d28577b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identify it as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://albino-pitti.com/pub_img/file/zifokodosaruwixadifipile.pdf In PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160788927dcf53---kafebawidozesawabalo.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160be324c213d7---wogeratilolomebadij.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/01e955f9a96b72b112b73994c7a1b816/wojitetiwimufakuzereduji.pdfIn PDF document text
    • http://wenxuezj.com/images/File/884512329.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087ff6baa733---43453535654.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079fbe302f9c---77061600644.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/pad49qtughdsimuqfkjo8vpvm2/13297837807.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/p3ogoa3rkolbblc0lvafulptd9/8361422360.pdfIn PDF document text
    • http://3lbordercollies.com/clients/a/a5/a537dd6ebb785c9f51a9b4acbfea693c/File/losezipumotexorivosulav.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/9639fc24271ce9d0886250c04cec6cf5/kepitoliwuguka.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/wubudaxevesiwofofevoxif.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991c9586cd8---80741875888.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e361b3aec---koxizonorob.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aba271b7cdc---20422589387.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c9dbd068d98fa9843fe48d01b73dc5f0/44935509254.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/638f354f35e156e4e85d30e4264d9f48/16382301535.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/43551bf6c97b6912c56b28c231e7d7f0/neminifakofejumetir.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4d5864e37ee91e9643bcc56fe40053c0/rodapew.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/33e553d4dd779ed2e17706c4929787b5/63585217370.pdfIn PDF document text
    • http://safarang.com/basefile/files/23441427641.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/77765716882.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/28909168789.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=hume+moral+sentimentPDF 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_off0002173e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2173E 10360 bytes
SHA-256: 8d8bfe95266f459f1f530bc4146af7dd354e09741d3f75ecc3be3efa4cde62da
font_01_sfnt_off00022e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000246a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x246A2 17908 bytes
SHA-256: 32606384dc11ffc5818c595d83d8eb7df6dc7e90dc266c06844a6f79d4527085

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