Malicious PDF — malware analysis report

Static analysis result for SHA-256 5618351e7334080a…

MALICIOUS

PDF

67.7 KB Created: 2021-02-12 06:50:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f05f228420949ee3bbafd5c45df43e0c SHA-1: fdcf1393ecd1aed2054db7faf9c666d73c1dd219 SHA-256: 5618351e7334080ae134e6bfd428d1d3d0d82b13c5cef33209a0e7e5231d875b
104 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to 'jottigo.ru' which is associated with a critical incident reporting lure. ML classifiers and ClamAV detections strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URI are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/wb?keyword=critical%20incident%20reporting%20nsw%20health PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380876/normal_601caaebf2976.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381532/normal_5fe2280a8f93d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373517/normal_5fffa311bef8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_6014a50d480dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471273/normal_5fe4f177eafbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_5fdac7acb7481.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380076/normal_5fe4b4634aea1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_5fe2f353c92dc.pdfIn PDF document text
    • http://astropsychology.site/mvp_pro_lift_trolley_jackw3bbw.pdfIn PDF document text
    • http://gatigade.iblogger.org/magonon.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/rabewiruzitewa/bcom_1st_year_question_papers_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/matujavusur.pdfIn PDF document text
    • http://sidiwen.epizy.com/magugojatelovodevefagep.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/puditurirekiwogivim.pdfIn PDF document text
    • http://wujedulagux.rf.gd/example_of_digital_forensic_report.pdfIn PDF document text
    • http://bibuxidon.rf.gd/42936913694.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/pet_animals_printable_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/wiranuzobuve.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_off0000ccbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBF 5332 bytes
SHA-256: 8538dcdc42b5698205655d8f5f7f553ad98ec50fbab063521f5f20c01847b5be
font_01_sfnt_off0000dee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 10224 bytes
SHA-256: 2670a0652a31aab3424847fdf9ef0f8b7337c60efa0ebccc3c656d0e7de5b666

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