Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b0bfe1db8e3fa4…

MALICIOUS

PDF

86.4 KB Created: 2021-07-17 23:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 02191b8c799ab83f8ef4c432b60901bf SHA-1: e7dde8ebeae293e4ea2862694aa020b06799d583 SHA-256: 15b0bfe1db8e3fa498049c8717c0c7d69c6c5b515188e94e92571a8e056805cc
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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
  • 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://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/68ahqbhrru4d0up304cfa8l7t9/galexisodanilafazif.pdf In PDF document text
    • http://newmanclassof1965.com/clients/4/4a/4a7b3a1a0fb21659e68ac19badabb541/File/nezobigerusenewujosigu.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/70714152649.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/tigumokupojezipepamino.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/71469708905.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b29ee20157---94870811951.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070be76001ec---60644970287.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/abut1k2sv533015p52i8vn2ei1/jewivozalig.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/nixapemag.pdfIn PDF document text
    • https://yalcinplayer.com/calisma2/files/uploads/xegabisamupu.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/barorularurijesivuti.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/129e56bfc4e3c48f48c846439fca1464/punokebegozanuwazemusomu.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/14274940746.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/44177845059.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/togodapajiwera.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/zasifabawilokirid.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/46401069500.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6bc460d67---70443273397.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/kadexulozubexagokupadam.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/zumuxugeme.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c9be2a5b217e521b83c4ac650746c2ea/vuvavabaxujali.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/56536354179.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/58857598916.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/kaxefakid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=fast+%26+furious+7+123moviesPDF 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_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 9476 bytes
SHA-256: f51d5d1ed6f87b52d1b9f429dd51402bf3eddb0f0727a485d5a13d2cfa109c79
font_01_sfnt_off0000fd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0F 22012 bytes
SHA-256: 47a506890c51fd7a20dbe4ad89e9d10c101d27b9340bae06b7905fef53c54703
font_02_sfnt_off000133a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1