Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed256a7cd142c0e…

MALICIOUS

PDF

76.3 KB Created: 2020-12-05 22:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9ffa87cd0197fe39fc5bc3863decab2f SHA-1: d7684bf8d49bcfb72c7cad6003b8052a53975aae SHA-256: 3ed256a7cd142c0e4542c60058c3824ca703876b39d79cc9fbfd706a857595fc
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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://traffine.ru/strik?utm_term=nutty+brown+seating+chart In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5fae397f0f450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427799/normal_5fc239615d153.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/0774768b-af58-4dd7-89bd-1e52ead9eba8/38094101075.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf23a79c08c7f2b9dc110/1606218300957/muforal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf672a2dd96f5918e7230b/1606379308153/devudogegaxeguxupigiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6052205-243b-4fde-90f3-82e700c7537d/kiss_the_rain_guitar_tab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf0379ee0f32b8718a4f5/1606283320703/81813902455.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1f5a3c6ccf69f32764ee/1606295387746/swtor_customer_service_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b689a8e-46e8-4f68-acbf-5c31df62da5a/nourishing_extract_monster_hunter_world.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/make_a_image_transparent_in_powerpoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed35587-e0fc-4b97-ab71-28bfcc426ea7/kasazixi.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/tududujeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da796a89-e1c0-4c6d-9148-7c8b641ed3fe/muzotigofodomageta.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79de6aa0dc1643a3271d4/t/5fcb46349708706f3998dcd3/1607157305926/knights_fight_medieval_arena_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf534e3c6ccf69f3553516/1606374240275/bavozazigeru.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_off0000eca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 5332 bytes
SHA-256: c04ba2510bb61e92decc6da233fc43603b528c2f7e3dbbc493980d6c9bdfffd5
font_01_sfnt_off0000fedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDD 11424 bytes
SHA-256: 50e29c6594dac803a4f43942eb88e41db8c4c4894d55920eb5524fde4c00e38d

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