Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a1f1910a226a39…

MALICIOUS

PDF

76.0 KB Created: 2021-02-28 05:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 9e74ff05788412875e57e7d4e82f0403 SHA-1: 0bf0bdc05fff8b56f7d95e53354e0e91b3d2d095 SHA-256: a8a1f1910a226a39c835d8bbb7df052e3697f2de6e5b9f9be57c3c760b1f13d4
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://crophysi.ru/aws?utm_term=how+to+enter+wpt+poker+tournament In PDF document text
    • https://cdn.sqhk.co/jokawefezo/Jqhbigv/kenixuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_602b34c20c7b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fdec4919894b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_602edb155644e.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/ibgi5wl/14716977070.pdfIn PDF document text
    • http://interbankdigital.com/623605882346ewmc.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/ifG8hcJ/galaxy_of_heroes_star_wars_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/fN5ieie/fijuga.pdfIn PDF document text
    • http://servicesforsupport.com/dupoxlzec6.pdfIn PDF document text
    • http://titoto.xyz/adriana_calcanhotto_albumr5f0p.pdfIn PDF document text
    • https://tutobino.weebly.com/uploads/1/3/2/6/132695576/vomadaja-relosafabax-wazezaxinajevo-sunoxufakebopub.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/YFMgdJq/70314773096.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/a498ab.pdfIn PDF document text
    • https://rijejoxutozi.weebly.com/uploads/1/3/4/5/134599637/4c762208a3c2f2.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/wibedubosateg/dc_library_overdrive.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/28096293789.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/nakugovadov.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/bd_police_job_application_form_2018.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 4872 bytes
SHA-256: e165abba655981f50988fd661a33ed895561fdd53e00581c6b4ed0bd99e3f5b3
font_01_sfnt_off0000ff2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2A 10608 bytes
SHA-256: de6d0288bc157c0f8edfb3ad28f440b2ed9b241e421789e7eacec0df0c5d91c4

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