Malicious PDF — malware analysis report

Static analysis result for SHA-256 8056475ead985c88…

MALICIOUS

PDF

67.3 KB Created: 2021-09-05 18:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 467c62f54f1a672134ae7a54ba6ba67c SHA-1: 616d6e6659e2acd4e806a79a7c82012ac7363851 SHA-256: 8056475ead985c8845f84bf2ab9daf825786dae0ec0ffdb5e8f6326e6e5dfe6d
102 Risk Score

Malware Insights

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

The sample contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The numerous extracted URLs, many hosted on compromised CMS platforms, indicate a link farm designed to distribute malware. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

Heuristics 5

  • 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
  • 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://crysiq.ru/uplcv?utm_term=jim+rohn+7+strategies+for+wealth+and+happiness+pdf PDF link annotation
    • https://parklanehotel.asia/userfiles/file/99161046774.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/5380639594.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/29320905083.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bedcd25de1e---17255868849.pdfIn PDF document text
    • http://vilniausgreziniai.lt/userfiles/file/5919082345.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/c3903960fbf6d5558a28198d43d9eb7e/53477780424.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa5cd54cd2---rumatikurofu.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/sadufolan.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/e22cca0e6c809c0eaa3f96c35c009651/16963064455.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/1784462.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/cc930bbeb9deb90d754f5c821c7a1f0d/lavawujezi.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6fe897176---xifimojaw.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ced0d6fd7---nukopazes.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/valadumaterogil.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/rojavo.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/81293533066.pdfIn PDF document text
    • https://papiratisk.cz/soubory/bisugubobamojenokab.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/timefisekanofojetisarok.pdfIn PDF document text
    • https://digireg.it/upload/nesaxi.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/90219583713.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cecb4434e6b---81925081487.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/11094289675.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/zewefebavudutizoranakosi.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe013e8015---xepezagagizidigukijef.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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