Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedb8edcfae0e0ba…

MALICIOUS

PDF

76.1 KB Created: 2021-10-01 09:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3ac37afe46cc454d0705dc69f71c1d73 SHA-1: a7339a6fd2301222ac24938f0ab05e31475339c6 SHA-256: bedb8edcfae0e0bab9a521cf23d7854fd7843ef546d4698d9aa19f0313209175
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs, such as http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16144ff1fc6406---4486705728.pdf, are likely part of this redirection scheme.

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 http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16144ff1fc6406---4486705728.pdf In PDF document text
    • http://naim.naparts.com/images/fck/file/fejepi.pdfIn PDF document text
    • https://777mto.org/contents/files/71004278503.pdfIn PDF document text
    • https://on-the-markmarketing.onthemarkmarketing.com/userfiles/file/52508162119.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f35ff340dc5992d5da7839117d5bbdd2/63067328926.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/93446429860.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/98028403709.pdfIn PDF document text
    • http://fxmeat.com/upload/file/7f1b5824479dfc4028466cec67be7a31.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/18972464445.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/46740514729.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/85892921420.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/zizafajopigo.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/51493145734.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/40106819594.pdfIn PDF document text
    • http://www.toptehnik.si/images/99853993695.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/bojafomodokopirosenabegof.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/23547015601.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/2571145243.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/gifedojojadetijotukoxeka.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614f4d9fbdea8---73399590898.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/gegekimuteloribowom.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/66288908722.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/potizixabovu.pdfIn PDF document text
    • https://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/25198466629.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=battery+repair+androidPDF 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_off0000c28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC28B 19016 bytes
SHA-256: 4734ce30e4ccdd8b0bb1d788d3824ffb9d7615d0cb935f0864b9a7ba77223ad9
font_01_sfnt_off0000f343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 10336 bytes
SHA-256: 9a25f1aba71a3a9f9a5a70b8e9f23cb7947ec3f865654e7caca35abfa4c2d7a9
font_02_sfnt_off00010abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1