Malicious PDF — malware analysis report

Static analysis result for SHA-256 d054c61663b927d4…

MALICIOUS

PDF

81.7 KB Created: 2021-02-28 11:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c31347c7df0f78ced7fbdc91fcbdf779 SHA-1: 47a6b07650bc449a0383c6a52d4d03a89527fe4d SHA-256: d054c61663b927d41976959d1bdb813865eb807410e150f7bab48c7dc2641486
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though partially obfuscated, contains text related to 'how to change code on onetouch ultra 2', likely a lure to disguise the malicious URL embedded within. This URL, https://mezovuduw.ru/award?keyword=how+to+change+code+on+onetouch+ultra+2, is the primary indicator of compromise, suggesting a phishing or credential harvesting attempt.

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://mezovuduw.ru/award?keyword=how+to+change+code+on+onetouch+ultra+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417986/normal_5fe350e391695.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374359/normal_5fc715379cdb3.pdfIn PDF document text
    • https://cdn.sqhk.co/sasibasodiwu/E7JhiBI/bivoxapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_60242b528141e.pdfIn PDF document text
    • https://cdn.sqhk.co/pivifilogopa/ihyhaig/solar_system_the_best_educational_apps_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/rebabafa/jhjajaL/87734668922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495974/normal_5fdebb7f9ba15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_60259934329bc.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/gezizefefififa/kurolururovazededoti.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/book_cover_design_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/kpmg_cacee_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/fpt_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/free_printable_calligraphy_guidelines.pdfIn PDF document text
    • http://tikomiwewo.atwebpages.com/xijetapar.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/american_english_file_3_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 5208 bytes
SHA-256: 37e1e938f626ed65099211aa881303a255ad2e4b9f0185b27902bb20be5c8f88
font_01_sfnt_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 15852 bytes
SHA-256: 38adadc15414bf9239d5a906ad13f9e7621496e4aa50d4693e230830ffeb3fa1
font_02_sfnt_off000123ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EE 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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