Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b3b009cb512ecd…

MALICIOUS

PDF

79.5 KB Created: 2021-09-19 13:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a2bf83eff4967c2430c76a28b66547cd SHA-1: 98a656aae05a29f9b9719f8cda034aeeaaea6604 SHA-256: 37b3b009cb512ecd38ae4db4b68c2ab0f06378589bc5ad8ccd4d48c82889cacc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to execute malicious code or redirect users. The PDF also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to obscure the final destination or leverage compromised infrastructure. The presence of these elements strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b764de6795---72265293475.pdf In PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/45996766917.pdfIn PDF document text
    • http://contelex.it/userfiles/files/64594555953.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/12590161970.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/geposuxobimilevusopus.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/2720407827.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/47849515825.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613091d4ce5e7---vuxojiroras.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/96894711249.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/77718174260.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/jetij.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/26823084703.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/dusitub.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/75968355008.pdfIn PDF document text
    • http://thaide.org/userfiles/file/niwemap.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/juvejofazekemokijepuka.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/nogadalu.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/c693df1e204c904e8bc79e2a0b4f5887/71963354163.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/65031843417.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/70239203139.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/88156228471.pdfIn PDF document text
    • http://shouce-image.kuchuancdn.com/Public/resource/files/wiximosukiguposawojal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+send+a+file+from+iphone+to+pc+via+bluetoothPDF link annotation
    • https://mediaget.com/userfiles/files/jagemi.pdfIn 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://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_off0000d00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00C 17768 bytes
SHA-256: 920e694155955727b242f7a949827b3961065c0700dafd3f2e75d713236735a6
font_01_sfnt_off0000fde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE5 11268 bytes
SHA-256: 0dfabcec8616839cd4de02123f1305daac8f4c7b32988415f117690f33ca816b
font_02_sfnt_off000117f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.