Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9996f22752ace5…

MALICIOUS

PDF

77.6 KB Created: 2021-09-16 16:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 60424c67f97d2fd8b421657a1092d8ed SHA-1: e64963d1d5737a377a3c5c8a24af1a372c508b89 SHA-256: 5c9996f22752ace53578bc848ae3120b1ede2449e524e12259565af21033a940
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress uploads and disposable hosting, likely intended to redirect users to phishing sites. The presence of external URIs and the overall structure suggest a phishing or scam attempt, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

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://krisoc.ru/uplcv?utm_term=gta+5+online+kings+money+glitch PDF link annotation
    • http://shopabrang.com/images/files/46759418334.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210911202707_ojjkl8.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/jederefisi.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfd7dd3129---14221677347.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/1120595433.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/96069674386.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/97130961362.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/uuoghhrahli1hskna4te5t2s7m/97063379407.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/turorulepe.pdfIn PDF document text
    • https://eguiders.com/uploads/47325574839.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/82845025755.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/daxozonewukivipemopazufa.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/xulinizesegiraror.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133722f38650---44441034433.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/645c6fa6b12a8be7ed49c59cd56ad0af/3227995350.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/latavipelimabasi.pdfIn PDF document text
    • http://jwconsult2005.com/file_media/file_image/file/20771246090.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/parobonotulizapul.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/rituluwuxizefi.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350819caee3---42295240445.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/87159299086.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/4acfbb26c8caf27eb30b7c890dcb9a7f/29161385584.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/446501497.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/93942380839.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 10956 bytes
SHA-256: a36ce2f638eeb63c0b8a67ceab7d454b54c601a3d4a41121fa62ab900ec989b0
font_01_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 17652 bytes
SHA-256: b7e7bc352b561990b90d2396925d7531daf49bf133bb3ae727e2f84631cb521c