Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd22a6e282221a0…

MALICIOUS

PDF

87.7 KB Created: 2021-07-03 23:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: cd83b2e11a3affe3582750b68abf2995 SHA-1: 09d022e7255335a9d93ae2c5e5fbea3ca4a81e48 SHA-256: 8cd22a6e282221a09d15228e85bd000b1aa61e4749e775cd224911d3da9cb372
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier strongly indicated maliciousness. The presence of embedded JavaScript suggests an attempt to execute code, likely to redirect the user to malicious sites or download further payloads. The document's structure and URL patterns are indicative of a link farm designed for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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://batikatravels.com/userfiles/file/lovuz.pdf In PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a93f0b9921---75158206410.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/jeziruzubukipaxutudi.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/dcbvfseq9l6mgcmt9omaod73c7/niwolanemunonasonomezinod.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/51209678154.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ad4aa0c69---xibufazapuvizoweloge.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/mapuzamukenawiwafij.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/lorepejubopom.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/20b9484e8ecd263ae15390e8a1151f11/10221827687.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adaf5b49974---21057440209.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/juxevarafal.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/f4e9arbndlvcl8uqcou4qnq9ht/53443200620.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/29285735096.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/a11ifr7lm4kjjvrbggav5b83ji/teposagukikeduzoge.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/anj9ijqm6kgb4fjtntav398v93/zidudarikisuturiwom.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//68355622375.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/80299463045.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/72965801752.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pixezubupuravetogodud.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/77021673746a43e51791beb21612423c/39537189703.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/bedipunivaxemasedoseguvi.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/61746147917.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/l6gfvk00mctjaim11q6e3ugbcj/11532682405.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5cdda11fb00ee5e30a3afe2ef3977ca2/42365033787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=herbs+you+can+plant+togetherPDF 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_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 10908 bytes
SHA-256: 65dbc1b9bab8f54e77085402090e476d9e1dab38008ee75f4fecb011047d4387
font_01_sfnt_off00010ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F7 16556 bytes
SHA-256: 306c1d8ee85b084a74db4fc4f01c12fa072f0ef7002b76edc81b08c372a7f792

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