Malicious PDF — malware analysis report

Static analysis result for SHA-256 faee9e283d2073f7…

MALICIOUS

PDF

69.4 KB Created: 2021-10-04 08:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 87a750f0f89754c5722aa4135c42cc31 SHA-1: 0eca71cf3de97399aa230653811c7168e8113de1 SHA-256: faee9e283d2073f72af3b04d211d61f2cf932a76c699aa81afb040b31799a436
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://beautybybelief.com/admin/images/file/dowipizadupabanefapanawij.pdf In PDF document text
    • http://apple888.vn/luutru/files/53766717762.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/powuribi.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1ff1db40f---18476984912.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/fekara.pdfIn PDF document text
    • https://ms02bet.com/contents/files/96318284912.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/06uj2ho1q2caco5lcalq7d336a/voxitimutoxal.pdfIn PDF document text
    • http://fohow77.ru/upload/file/poxojifinefimeno.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/40d2b52d17380d60d732ac68604136ab/mimokoxopotumekuwokape.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/dowusovefewevet.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/jezuvitinuxisajidizol.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/44617959024.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/jediwulal.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/86111713173.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/14sugdvbtvog2q5crh901h8q01/baridapizewe.pdfIn PDF document text
    • https://centaur.vri.cz/docs/files/dixapimalewojuwixetika.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/tuzimelevisawisopipin.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/90843505287.pdfIn PDF document text
    • https://dienmayminhchau.vn/uploads/news_file/takelimumudavugup.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/bujaduditotibu.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/70685797134.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/34370152907.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/mubagiturag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=basic+concepts+of+finance+pdfPDF 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_off0000b2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E1 14768 bytes
SHA-256: 8bb8a14410be5554b89e95ecb14d8460d3ec6cf50f71800dd9be91061ff6af53
font_01_sfnt_off0000d7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D7 10520 bytes
SHA-256: c66bf93962d015d3b7a38fa3fee656028da9187cc1a4ebe4aba5773e7b0d148b
font_02_sfnt_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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