Malicious PDF — malware analysis report

Static analysis result for SHA-256 075e51d5b854c23b…

MALICIOUS

PDF

83.5 KB Created: 2021-07-08 11:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c5d977ca14dc43a31e50b38163607256 SHA-1: 909dcb20a19cf296c55b873d93c93d82402bffae SHA-256: 075e51d5b854c23b5481a73226943f179e28132e91ada027c801625ce69c9679
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to distribute phishing content or second-stage malware. The presence of multiple external URIs and link farms suggests an attempt to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=deed+of+sale+of+land PDF link annotation
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/fm4j1unngg2jb7f6ols3pl9b7b/gopivixumar.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/fikutosodagasitovag.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/24831183050.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/3260717ed0a0001ef0439d77a2b1742c/bipabi.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/xuleziloruxifarizelowixud.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/bikumotuwizejewerid.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607319da39baa---53303092913.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/lupejejijivanalapes.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/86238701061.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c93cdce40---kirakurinogiribe.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2d66166ea---ragomatexizekugede.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/tofabamo.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/j6hr1qg21uuc7safn8i70li2s3/40481126462.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/092f4fbaae358b920856c18299c36307/10607656584.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2683917b6---vesovaxosok.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/e4iqh4hk2qa93eaqpdh1b50mh5/wifefikegubexopejutojixi.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607be9535ed3f---rajetuzusokafexomitozuto.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/ce4a144ee06e2d03692246831e68194f/mejinuta.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5b9a6c53a---1491005092.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/juneworurawi.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/4sun9ovfjbptv06dioc6afd3i3/ziwez.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160967f64940f7---fagenajogirokaremek.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/713bffc2a4bfc27c97c72432b533b804/polalobudezajezoz.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_off0000e80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 10056 bytes
SHA-256: 2f1f60c42804abee9d193f6fe66bd2fc99131b3d91c9f2b66ab8850b4339a73b
font_02_sfnt_off0001169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 16316 bytes
SHA-256: 058348c4a9be8385c3947982694491c3cccf146db9b6d220c5301ba5cbfd3493

Open this report in the interactive analyzer, or submit your own file for analysis.