Malicious PDF — malware analysis report

Static analysis result for SHA-256 71edbbfe3312a9c7…

MALICIOUS

PDF

74.5 KB Created: 2021-02-06 20:19:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 88b438d7c259dce22ad7b403263a689a SHA-1: fce60432d838fa077ac0e9f61026fe77da36ef4b SHA-256: 71edbbfe3312a9c779a0dcc8e04b39d9da7947a3d6c1eee43e0e093ad74b956d
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/aws?utm_term=bethel+music+starlight+free In PDF document text
    • http://gta-msk.ru/83379761249vtv6l.pdfIn PDF document text
    • http://auth02mobility.com/xetojkqbec.pdfIn PDF document text
    • https://fudexevanege.weebly.com/uploads/1/3/0/8/130814713/suxagide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_6015a3d7259fb.pdfIn PDF document text
    • http://lovechat24.club/this_feeling_chainsmokers_song_mp496h3q.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/scythe_miniatures_painting_guidetjx8p.pdfIn PDF document text
    • https://vojizozovogimum.weebly.com/uploads/1/3/0/7/130740342/sakesajozizud-sujetekojizesos.pdfIn PDF document text
    • http://hookup668.site/business_model_canvas_vs_lean_startupvi0lb.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/b849d2.pdfIn PDF document text
    • http://copyright-services-us.com/de_bello_gallico_latinocn3w5.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/tokatefozude/bsc_nursing_online_form_2019_maharashtra.pdfIn PDF document text
    • http://wigazimo.epizy.com/stop_pop_up_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/jumopizagugokasozefo.pdfIn PDF document text
    • http://fafebexa.epizy.com/dls_18_all_team_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/chiasma_formation_def.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_off0000e656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE656 5344 bytes
SHA-256: b8ca981d9a3020d1a7e9fb90b5e6a09561ecf5a0dd49438aedcfd34a5d4ec3a0
font_01_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 10732 bytes
SHA-256: 9d41d21f8a2e0073587c86078522208424c49c785acb89a92401ceae86b44688