Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b56b94523b8ef5…

MALICIOUS

PDF

87.9 KB Created: 2021-09-03 05:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2fb5e3e0263bea42d90a45997c8ec730 SHA-1: 0cbaa809674ecac45c3a8f1ca48c9c30fdb04dbb SHA-256: 48b56b94523b8ef55854b993db5263690b42cd6e3697aeaa61e8a5ccb4178d59
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, many of which host other PDFs. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using compromised infrastructure to host malicious content. The embedded JavaScript likely facilitates the redirection or download of these secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://akinmedikal.com/uploads/file/giguxasumateguj.pdf In PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b44d89dfe66---wekezumalalevegixivowu.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/8a019776f2fd01d021368f17cb065e0a/8545887640.pdfIn PDF document text
    • https://photojet.net/userfiles/file/labogo.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/lububopisuwodekexezesekev.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ea41599757a6d5cb5254bbd19c41d369/13068731729.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609842503de42---44839494594.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/601f1675b2649d51f97b0cc038d04d3f/topuzesagafizojiduf.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/14814076989.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/92021642722.pdfIn PDF document text
    • http://pjteam.hu/uploads/sosegepamagonefudotozij.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/95728703073.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/161069bd9786a3---4598940412.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/cbc5172f55de810c2b350114aa8b8b3f/76344365310.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612340bf0d81a---tezakefonutafelarasoje.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/7e36ea0e2953106dac6476f45c7df177/tugani.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/jibiguzuzemugiloxagabal.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/55987586eb5a39fc5f9b3de82f12d95e/lirivuduwizuvufepepejepil.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/58012410763.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/60024541296.pdfIn PDF document text
    • http://veitali.com/upload/files/robasolokokawopakebir.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/daxetofevebivubo.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8177b2c0e---64079903635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=traffic+light+controller+using+8085+microprocessor+pdf+free+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 16912 bytes
SHA-256: 3a77693dbf99992365efa59fd596d3bb8863f45f418a15684a06649bdb9fe5cd
font_01_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B7 11680 bytes
SHA-256: 3862778e5f3e1a9a53db20ab815b0f7747966fec397b7294bebe9a91e190d1fa

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