Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd3dfe12839c09b…

MALICIOUS

PDF

71.5 KB Created: 2021-01-06 15:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 98778dea70db55b79f6f0e105faf2843 SHA-1: 947faff0795d5921fa5eef423effa6ff9da013b2 SHA-256: 9fd3dfe12839c09bba317dce710cd98739e8e8b69046ade082da9c54ebff80fb
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI and a lure for a password-protected archive. The embedded URL, https://traffset.ru/aws?utm_term=nero+burning+rom+free, is suspicious and likely leads to a phishing site or malware download. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest an attempt to exploit the user through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffset.ru/aws?utm_term=nero+burning+rom+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488837/normal_5fcd25febf741.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/YJthagh/top_ten_best_comebacks_of_all_time.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/bgiibic/46264662465.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367923/normal_5fdeadbb59525.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/dorobukasawituw/what_is_dikw_in_nursing.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/similar_figures_worksheet_geometry_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/1180_tres_ninos_corte.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/melaleuca_cajuputi.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/baixar_netflix_apk_4._4._2.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/vigatusenotolozefum.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/77266015913.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_off0000dd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD05 4776 bytes
SHA-256: d7a010c79cc1a10ec7b1dd409c0f6bb1ef2dc8a922ae06da4e853a66c98f949d
font_01_sfnt_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 10772 bytes
SHA-256: 5aece709016fd7ba343d3edb937f1b258385f7e2a98f6897ebd1ec4dd1766aaa

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