Malicious PDF — malware analysis report

Static analysis result for SHA-256 496e81892bf7d9f0…

MALICIOUS

PDF

72.9 KB Created: 2020-12-15 11:08:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4da04b2564ca6fa2aec6243db4e78a1f SHA-1: b67644be4014288a06f202d0eaf67147fbb84eb2 SHA-256: 496e81892bf7d9f007046e4f11d47e87f3ecb10958d1baf0644d938f7197468a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a large number of external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV also identified it as malicious. The presence of external URIs, specifically 'https://trafffi.ru/123?utm_term=the+red+fox+clan+pdf' and 'https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/ximazasitupinegopam.pdf', indicates a likely attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=the+red+fox+clan+pdf PDF link annotation
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/ximazasitupinegopam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_5fb8f35112840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_5fbb0cc543189.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdb6fb3-0635-4858-807c-3466773e3b13/conceptual_physics_practice_page_chapter_5_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ae857d0c8f249d464d7c/t/5fcec17155629615613dc59e/1607385459987/sniper_ghost_warrior_contracts_ps4_ign_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d135bf71053ccb0fc630/t/5fcb1ed97ab0f364aba72b3e/1607147225495/bad_piggies_online_2018_sandbox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6c11e6d49a06bb8a7974/1606380561441/pathfinder_arcane_archer_magus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf1ed72f8b574a0f24e8c/1606218222821/card_stacking_propaganda_examples_in_politics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350d8254-b0aa-4e49-8da3-e5b55f03418a/2010.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/masonite_sheets_menards.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0f3f7cf8c75402ad020/t/5fc1b3fb7acac6192a00b0f5/1606530043293/judicial_branch_test_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/rpsc_junior_accountant_notes_in_hindi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29c05a3bf4b14abb4035c/t/5fc9ba4e2ae1264a0390d2c9/1607055958804/mediamonkey_skins_deviantart.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_off0000d4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B9 4100 bytes
SHA-256: d3042002fbe5cee17a6f399f1fee610215722be3442b5022d407f16662bfe752
font_01_sfnt_off0000e33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33B 5080 bytes
SHA-256: b7a0c9677231e587c785f2f29633f2f37f92d2b509ae6b1dfe5546813db80637
font_02_sfnt_off0000f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF483 9968 bytes
SHA-256: be86a718fcf824170105f5fba4e3781d57da472a9ae48481056c0e0ef6d3f1f0

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