Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d49def02dee93e5…

MALICIOUS

PDF

79.4 KB Created: 2021-06-13 07:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4898c3fcc1f0330fcd6472309fc28711 SHA-1: 559f55e6c644595dd407e57b940ed7275ab14546 SHA-256: 6d49def02dee93e5cb98620c638aba6ed17e55c6c1f855316c94921331e558e3
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed to redirect users to potentially harmful content. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final malicious destination. The presence of a 'download button' lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=singam+2+tamil+movie+download+720p PDF link annotation
    • http://jmdfhjl.com/fckeditor/userimages/file/pobilufe.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1622811869.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d074bbbbbc---12856651324.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/6p2ai48u985kutv092pjlq78fj/13315599631.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7e01420a---47578659521.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/e86f55a1924c4b3fb5ccfa833445f3e8/4558186081.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/vanemomikipidibusabodev.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/6e0b957a2845e3b655fd7e1e4a7cfb8e/wagodoxu.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3472fe27f5f9c44dd5b65a575cfa8f23/zisaxisirorabonumozurig.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a383150750---risuxeduxazututajagimaz.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4448bdfac---51447517858.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/6ec803ea4144df083d343f2859bed916/xopigidumi.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/0b8c9b58fb32f7196b398ee097b7eebc/salowuxewawozafexekabonot.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/47130509088.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e681de98a0554c7e8c9c7635c94fcc0d/vavabivo.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/varekavurat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 5400 bytes
SHA-256: 092a46e10732648dfbdc748aa3276c3577fe579d1540ce9a7185a2a612970114
font_01_sfnt_off0000fe5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5B 10628 bytes
SHA-256: 0ba31e78268d8229de9094700b2b58a5b8bcce8309d277e76535ec1ee55099ae
font_02_sfnt_off00012284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12284 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378