Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14671c742bedda6…

MALICIOUS

PDF

81.9 KB Created: 2021-01-13 01:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4637cd050ca990283f7b99e19906d32c SHA-1: d81ed8281fe2d1438b096dcbf22d431e95b9ec46 SHA-256: e14671c742bedda6b78f6a52803abc2a76230da8b0ac193f2b5b2e0ad6a50828
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains obfuscated text and an external URI pointing to a URL that appears to be a lure for downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an external URI suggests an attempt to redirect the user to a malicious site or download a payload, aligning with spearphishing tactics.

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://traffine.ru/aws?utm_term=android+camera+activity+source+code PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5fde4e0560d95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407304/normal_5fa6418086de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_5fefc5b78fb9c.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/sajatesawodiji/danukulitofefufovajafakez.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/xezuwasawa.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/57834900210.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/instalar_android_auto_en_mazda_connect.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/nedinon.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/moves_like_jagger_drum_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/abc_news_reporters_darwin.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/reset_phone_app_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/72706822834.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/accenture_interactive_email_format.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_off000101d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D8 5204 bytes
SHA-256: 367c145b5fefb3e1d67ef787ca4250fae06a9b58f6b04e70138c699da92565fa
font_01_sfnt_off00011382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11382 11980 bytes
SHA-256: 3198d2d29d6e6de967000a111e1e78caeb70b97e1b04119d2e90edd75610afd4

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