Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e6ecaa2b11350e…

MALICIOUS

PDF

86.6 KB Created: 2021-07-16 22:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8a337d5f84dbd0c940810801ded3e41e SHA-1: aeb396934d36d3e9e3f5ccdcd5785bb5ae039422 SHA-256: e9e6ecaa2b11350ec77cfde55f25afef9f11cfcfc789bdd873eeecdd3b749f02
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing pages or further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this behavior, suggesting the PDF is designed to host many links on disposable hosting for SEO manipulation or to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/cqg6ph0gplo1l8u20l2cfkgjt2/babowolupebalekidu.pdf In PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/20876432475.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/c395df29c5a22f7b5b57e8b2896fe559/51928326680.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec9dc27b86---73933485391.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/48866368753.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e4e1cc3a80b3c8ca911d4b0eabe29e25/napizuvasesigenano.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/nebojezexos.pdfIn PDF document text
    • https://transit-connection.com/userfiles/files/28449357307.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6cc0e703f---78663873628.pdfIn PDF document text
    • https://patc.fr/imagesfile/94830950240.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e80d11ef64---dazokozuparexexisu.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/tatowubidalejivapeje.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/ab8bf4888da152bd12cca42a87b09490/47283841177.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090623ff405a---sevigilidejula.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/xexigun.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/87588419170.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/fuwiwerube.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd8d557952---waxifitijukenu.pdfIn PDF document text
    • https://area5srl.it/file/15964408159.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/kakosulinazeruk.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/63fd3mhb482decrsm0qlhcpkut/bigotuzutat.pdfIn PDF document text
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/dafukukanexakekudokovodot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=tamil+month+with+english+monthPDF 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_off0000ef28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF28 10504 bytes
SHA-256: f6986c34b3a3cebe9312be5b38c2b64fc744262ba91028a5a3330c60dac60619
font_01_sfnt_off000106e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 17028 bytes
SHA-256: ba8ca8bbf8ef7eb435ee0899d85b4854c4d5d9e86c5d83395dc415ab580ddeb1
font_02_sfnt_off00013369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13369 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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