Malicious PDF — malware analysis report

Static analysis result for SHA-256 225dae9c994707b2…

MALICIOUS

PDF

100.8 KB Created: 2021-01-16 01:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f682a72dc5eb27686c0821cbb292ef79 SHA-1: 6987304c03a72c5aba9769bfd137b69b0271f87e SHA-256: 225dae9c994707b2f078d68c34087817f35ed5e33efde6586c4df15c2df6c6fc
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV also flagged this file as malicious. The embedded URL is likely intended to lead the user to a phishing page or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://cctraff.ru/123?utm_term=mel+bay+modern+guitar+method+grade+3+pdf In PDF document text
    • https://site-1173660.mozfiles.com/files/1173660/puzzle_games_online_for_2_year_olds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_5fa05b66a4290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f8aff8b0cae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461767/normal_5fa1acb9bde8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_5fba44f791511.pdfIn PDF document text
    • https://site-1168054.mozfiles.com/files/1168054/antennapod_gpodder_sync.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406169/normal_5fb8028db1647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446152/normal_5fe3dbdbb8d4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f951e1594f79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424997/normal_5fcc60f6ac7cd.pdfIn PDF document text
    • https://cdn.sqhk.co/pidagasew/jbBTjdC/59177741162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5fe91db1c0e58.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/minegikukovel/4x6_index_card_template_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/chlorine_atom_bohr_model.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/jolexosolabubuvinepom.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/tatomamoketav.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11488 8924 bytes
SHA-256: 2fef0078cc714c66c70a89df0c858a749f2e5bcfd23f5d3a83c2a4b2b1a200d1
font_01_sfnt_off000131ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 5688 bytes
SHA-256: ca75c4f5c22ba54833c5ce29f4f6ebd7725c504e1d0b44003a21f79ce1452865
font_02_sfnt_off00014536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14536 13352 bytes
SHA-256: 2c7fab5f33283635bc70400f9c59bd1dc710057b00eb857f5b0b369833887e90
font_03_sfnt_off00017004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17004 16148 bytes
SHA-256: 4860cab040a7d98b19edeb5d45fce16dbf82a41428c9410f562da97ae50b0648

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