Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a89f161d7ee37f4…

MALICIOUS

PDF

69.3 KB Created: 2021-09-06 12:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8739f8815105dc81f3c2862f9505d3af SHA-1: 5ade7991f92d8e34ab86c7ea3f1ec2057d4479ad SHA-256: 0a89f161d7ee37f494fcd88a60dc02528274a181e9138e78d968d12f79679efe
154 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 it is likely a phishing or malware distribution lure. The file contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations used for hosting PDF files. The presence of these links suggests the document is designed to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

Heuristics 5

  • 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.
  • 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=garmin+forerunner+230+user+manual PDF link annotation
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/7c6cd9d28b0d0a2b2c14c18ff2bb9665/gowuniziboguvemopex.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/83ed5374e750cc527f96bccd556d3da3/puzalit.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/e5e0316ce37d5bdb7c740b48673d7dbb/690830496.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/40725886915.pdfIn PDF document text
    • https://wasael.com/userfiles/file/luwap.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/dalavilojimewawen.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/b93808b4d07f19ea52e5e5ee5ca05f3e/vivilasuzuvuse.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/55182500680.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612b7363bc296---vimozida.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33a157c9f4---debeduxuv.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/f6a4efa4f7c253a6a60b5c35aa8deb27/80143288758.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/62114132539.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/piwuxopabesumafoxovix.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/lh9iiurc8dnp4rm36c029lqmjb/21491456184.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/47940096322.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c016dd9e868---wudawe.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/88822625839.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/56576290632.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///29331606420.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16077643e8dc20---22420031755.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609701545da7c---96707800267.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1ec2f3c8b---60927376829.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160fe85fa22e47---gokowazumafopame.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/korezefesuwurulalunawojej.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/45051231270.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_off0000e271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1