Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d84497fadcf3bf8…

MALICIOUS

PDF

48.3 KB Created: 2020-10-17 02:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e4876ecad995ffd3ec8bbe23fd29fe33 SHA-1: ed4e3358497815b0cb2d1fa05a1241d9faf52c81 SHA-256: 5d84497fadcf3bf88364cba7afa50ef488d4cba94f281b102f164c81c6f63ee0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=5e+dungeon+master%2527+s+guide+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f8778abb5487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f87b2f55561d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f89ab3796397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f879a58c854c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f88cf93bced1.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/1f33c9799bee7ac.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/xobapererejogefe.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://waniremupamed.weebly.com/uploads/1/3/1/4/131407535/motugilelil_nuruzakinud_wogifemom.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/nukagibamawot.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/5b9fb2c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f88d21fc2fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f86ffc1d1643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f870329b3b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f87a85fa26d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5140/8283/files/wovidesisometo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4693/5969/files/best_free_antivirus_apk_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b6a254-4c5d-4a26-ac4b-dcca05080db2/78773705489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f00dea-5d0e-4777-890d-d9fd9ff447cb/66356439351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8817e9f5-46ee-476f-8171-851b29f5a3d5/zarulanazofidadijovogin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe1015ab-1cae-446e-ab03-ca5692d29169/causes_of_world_war_1_dbq_answers.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_off0000797b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797B 5392 bytes
SHA-256: ef3faffdc299a915dd569e920cf8187996b73e085bb06303f7df8c3f61ed68bf
font_01_sfnt_off00008bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB9 12412 bytes
SHA-256: 423e7ed6713fede10269b9d91e37f400e3d85ed116c0bc197675314513d77ca3