Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f104722b6c267cc…

MALICIOUS

PDF

77.1 KB Created: 2021-02-19 04:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0c5707376ca3a9cd70882f1ecbcaf934 SHA-1: 3778ac37d3e1137fe8bcefb66c639786bd7d9391 SHA-256: 8f104722b6c267cc7281019b6800411513dc2c298c66b953f1d0545708f72de0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL, disguised with movie-related terms, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics indicate malicious intent, likely involving the execution of embedded content or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/aws?utm_term=a+child+missing+movie+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374178/normal_5fe0de98c8438.pdfIn PDF document text
    • http://seluluxafej.22web.org/33178753398.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5ff528972e068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_6025c0498df55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fec43f4690d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408009/normal_5ff88acf552ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_6016c8d6676c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476142/normal_5ff60f178892f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tegewixu.epizy.com/76303189971.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/skyrim_conjuration_guide_reddit.pdfIn PDF document text
    • http://kiroxivox.epizy.com/arq_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/nuzumepopeg.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/jibarekefasafo.pdfIn PDF document text
    • http://nipuwiwabo.rf.gd/budget_plan_template_free.pdfIn PDF document text
    • http://pinezininefos.epizy.com/loxeno.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/35829144494.pdfIn PDF document text
    • http://verirajoxa.epizy.com/tibagekawatela.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/dota_2_item_guide_app.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_off0000f07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 5372 bytes
SHA-256: 7588a7aacceaabd2d967feace3371af22ccabe9b7237aac2c2c918ba34628680
font_01_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 10720 bytes
SHA-256: 4d4a99a8d19b8b1af5464c44dbaa4da757f7bf20b828bfb14bcec3323cc68da7

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