Malicious PDF — malware analysis report

Static analysis result for SHA-256 12589ebf521e2c0b…

MALICIOUS

PDF

90.4 KB Created: 2021-07-02 17:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fd9d3c0eddbef5b85d3b5fbb8f0e0bb4 SHA-1: d2a44300f951b3b9406b52d9e437e6beec00b35e SHA-256: 12589ebf521e2c0ba1bff3e7009f76fa3300eaec19274117d068778b20c686a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware delivery. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://drafthe.ru/uplcv?utm_term=seven+myths+of+the+spanish+conquest+summary PDF link annotation
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/pagufijasi.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/jadofowopubikaxajozoz.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32da29def---tanupukinole.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/a70f7d0b7b45a54c408f9569a96332ef/41304936285.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070df97a7039---83041997305.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/41683537145.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/fcd835adf0ed5927c22e7f40801975a9/37705463213.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/8n7qbu7mr4fs2u9d7etl86j1lc/kimawanuzanisejawuva.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/rakexof.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/potinotutipeza.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/ac8f8fc619a2c964f189d4bb3795148d/81425270018.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8cffaa17e---37318307692.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2eac326e3c---84951066872.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f163840fa---fiwejorolo.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/58bb5f7d0c1c24aaf9241a22f9df0430/juwat.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/xiwozasifunomizatepokaj.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/54067590270.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/jaxagopovas.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///97693491437.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/gefewagufunaz.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68d5cea5c2---29812729719.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3a864423f---56953253628.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/a5k1ds7p7h0m2ono070dggm1o0/38588728290.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/19000230272.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/kokulamaviwekulowa.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/a2d3cd5e2cb24f96890e65ca558794b1/pevifewareti.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_off0000fb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB82 11200 bytes
SHA-256: e9c035388c3dd804502839991b92d6130df4432e3f1327f7347e7b1050b41697
font_01_sfnt_off00011591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11591 17948 bytes
SHA-256: 8e9510a39c59a1b937f76c924b620fb19441dfa1adebbb82a24a4508f5fff4a4
font_02_sfnt_off000143f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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