Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec36a7b31fd0dda7…

MALICIOUS

PDF

74.8 KB Created: 2021-01-14 05:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5a845998fcc29671add47c6d024744f7 SHA-1: b5001017bf768460b8eeadf5b81f879fed970ff6 SHA-256: ec36a7b31fd0dda796cf5ff171bdc446779b25ca74da308b9da3bacd72758923
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/aws?utm_term=weather+report+in+delhi+last+week In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5fa6d745868aa.pdfIn PDF document text
    • https://cdn.sqhk.co/tejikeluz/b7Vyyjc/22491124911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f875ddc8ad1b.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/NZibzc1/red_ball_4_volume_3_unblocked.pdfIn PDF document text
    • https://site-1166051.mozfiles.com/files/1166051/31905052822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492546/normal_5fd6598e81297.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/jbuIihf/desejerezo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426271/normal_5fdd77f7a7d1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8e8f29928dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486565/normal_5fca1850bcbe9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387711/normal_5fca13c15e503.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/divikufifir/components_of_a_balanced_lifestyle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/badmaash_company_full_movie_hdfriday.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA47 5004 bytes
SHA-256: ce4884a8184ed47b504be7caa1844fb104a77d34200fa331e3ba11f83266c2bc
font_01_sfnt_off0000eb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB50 10960 bytes
SHA-256: 04c49ec21fb8d9a07a23b33c118c071b74e62fbca00c3ba5a400d0e1ffd41772
font_02_sfnt_off00011086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11086 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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