Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f1218b03b2fd4d…

MALICIOUS

PDF

83.5 KB Created: 2021-09-15 23:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8de0ca89245c17e9800e784eb9708f70 SHA-1: 81e1fe06c602b2970bdf43604c55a3cf3b75bb1d SHA-256: 24f1218b03b2fd4d3603efa6fc5d1499742288393dcc93a5879f5d21a5092b02
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to host and redirect users to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://vektorma.ru/uploads/assets/file/59216883533.pdf In PDF document text
    • http://live-net.it/file/66330710685.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/4338085427.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a156860030---funaxufuna.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/suxosorupinedux.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/variwa.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/bukagorurusoxabuta.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613170001ca09---6457797799.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613366214273a---1496624655.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/24776387565.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/69923211918.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d750b31216---19935626856.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/2617092555.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/99585541214.pdfIn PDF document text
    • http://hueide.com/upload/files/bitowulotapa.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/37sul1hvgtvnjm9v5lgtronv3l/53032925139.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/94574054793.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/98119132506.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/47504134870.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c65bd58043---saduzu.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/78144870621.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/68509909015.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/rabuposobet.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/fuzimapexexonezumekejojib.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/dizipedak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=wwe+2k19+apk+no+verificationPDF 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_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 10836 bytes
SHA-256: 0be295cfcace9a06bb6af430d0191090ac372404fbfc138fcb584c0589f7b437
font_01_sfnt_off0000fbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC2 17572 bytes
SHA-256: 27f2bf99e464bc518373273eeefe138c54e21098f52184c54796ebe37de8990e
font_02_sfnt_off00012887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1