Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e02097e742255f…

MALICIOUS

PDF

75.2 KB Created: 2021-09-22 22:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2fc96dd5990ba54185cad64f8e33e0ba SHA-1: 9dfa57941dcd1228bb9072e20ea2aa737e0b290a SHA-256: d5e02097e742255ffe83199ff109b256962ece8a6eccda925b8c72a13514192b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious external sites, indicated by the numerous embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://exihomes.com/userfiles/files/33441205547.pdf In PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/wufekibogixulotuf.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/kopodirabaf.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/44557430364.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/49071034397.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/59fcffd0630013aa7e14271a9afdc610/82242260359.pdfIn PDF document text
    • https://apelhijau.com/contents/files/rejedibefumobu.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613049f079844---rilodurefuvobuz.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/rasanekisifawumubewowob.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/munofapizemi.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161475845711c1---27031813356.pdfIn PDF document text
    • http://shoreluxurylimos.com/userfiles/files/vatonipat.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/91809940761.pdfIn PDF document text
    • https://areicon.com/images/file/zotufowapawigon.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/55193177272.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/gikukexosix.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/22488078695.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/zobeperebomuluwakaribusi.pdfIn PDF document text
    • https://majubesar.net/contents/files/fiwanoboxogojupujawezev.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/tubokovakaretaluxe.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/fofinixeremo.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/pedezuzogukalega.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/zuvefidapujadopixuda.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/zumalenunixox.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/mabijolekapisexilisanuge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=cloth+scanner+simulator+apkPDF 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_off0000c426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC426 10864 bytes
SHA-256: 4987092d5d1b563eda7ee370c127456cbe48a80387a1620ccfbd6aedbc88a782
font_01_sfnt_off0000dd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD16 16300 bytes
SHA-256: 856e80e00a0efab4ffb62bde1b0e2780144a976c71e6d3436ebec11c6ac0da0c
font_02_sfnt_off000106f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1