Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4eb976a6533a65…

MALICIOUS

PDF

67.5 KB Created: 2021-02-16 01:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b21206932b578d26da88827996111b85 SHA-1: b7216c8917f54dca6ba8c5ceac783729434596a9 SHA-256: ac4eb976a6533a6587984a03325afdd9589d4a8debfa7c9157c72de8ef3c4ace
184 Risk Score

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
  • 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 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://yafferge.ru/wb?keyword=xbox%20live%20free%20trial%20codes%20unused%202019 In PDF document text
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/tofesupu_gobasurawaxeten_wobovoro_podarixabegul.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/5871782.pdfIn PDF document text
    • https://mijevofere.weebly.com/uploads/1/3/1/6/131606011/acf5e94606f590.pdfIn PDF document text
    • https://cdn.sqhk.co/nazalugewu/dhhhggj/41158153183.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/pRiibxw/w_radio_en_vivo_emisoras.pdfIn PDF document text
    • https://nisixokavenofaf.weebly.com/uploads/1/3/4/8/134891603/3240566.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/gAjeqK2/vubedesuzafigubiv.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/memevemow.pdfIn PDF document text
    • https://jowozulabu.weebly.com/uploads/1/3/4/0/134013075/a3dc1b76.pdfIn PDF document text
    • https://speedboostpc.com/XboxClickIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fukepez/asio_driver_mac_os_x.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/linifigagajeg.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/microsoft_flight_simulator_x_2020_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/minecraft_unblocked_1._7._10.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/18416231103.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/dark_souls_ashes_of_ariandel_guide.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_off0000c8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C2 5744 bytes
SHA-256: 44e346932d30d45df8c296875933d36d81f0bcd0049521712e37ce3a51b4a3b2
font_01_sfnt_off0000dc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5E 10696 bytes
SHA-256: e5b3516da9e730075a7522721989a1a754d6d0fb46e6807e9ec2c7fe2c585d47