Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05e66ff9fffb60b…

MALICIOUS

PDF

92.6 KB Created: 2021-03-09 00:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4f86732c2c7388423fee51f4cc4f019e SHA-1: 5c330f699ea13103c917bfd382fafbcdf4a56857 SHA-256: d05e66ff9fffb60baf8c520a70fa1f6bd2e6406951cb2e370d72e80062cbc353
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'daycare employee handbook'. No scripts were extracted, but the presence of an external URI is a strong indicator of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/strik?utm_term=daycare+employee+handbook+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446784/normal_6043930d69563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372361/normal_600059e5b6e5d.pdfIn PDF document text
    • http://slimerecipe.org/45456030064o28zi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495525/normal_603ca8e26ac74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450512/normal_5fe96f743892d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_6036715cbe20d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384154/normal_5fe17dff81ef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_6039db3f62c71.pdfIn PDF document text
    • http://bilet-pdd.site/the_secret_book_listen_onlinej7ypd.pdfIn PDF document text
    • http://eduha.online/32654095149oexy5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fe69f6f4497f.pdfIn PDF document text
    • http://securityverifiedservices.com/how_to_connect_rocketfish_banana_plugsojbdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366344/normal_5fe4ac3ec083b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jozaponi/certificate_format_in_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/lozafo.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/kuguwerawejuwizofokimobu.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/sonogolu.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/alzheimer_society_of_toronto_referral_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/what_are_the_three_tiers_of_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/the_bfg_book_how_many_pages.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFE 5920 bytes
SHA-256: d8fca237eceed7daa7a1a4e52133be196aa818bfa68f292b3be30f23e5c522c3
font_01_sfnt_off00014207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14207 10240 bytes
SHA-256: d86ae6a3925c8b62d59c6535ac60eeb3f4dc045012e9ff4fa7581fe3f7fa2902

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