Malicious PDF — malware analysis report

Static analysis result for SHA-256 540cf1a9e7ad4398…

MALICIOUS

PDF

71.3 KB Created: 2021-02-12 16:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1aaf07654e7eedf3213ce867078bd4b3 SHA-1: 4af8b9494245246434b7614040a32077efccd8df SHA-256: 540cf1a9e7ad4398819ee0806507270a9bf62b61b5f0b2a04c752b09d31c3855
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wix?keyword=god+of+war+4+download+for+android+apk PDF link annotation
    • http://sdorovie-sustavi.xyz/third_grade_learning_games_apk7j62u.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/gdjcicr/infection_fatality_rate_covid_19_by_age.pdfIn PDF document text
    • https://zovakobazala.weebly.com/uploads/1/3/1/4/131456363/6aa15bccd3d52.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/gciagcw/fukuwozitiki.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/Gehegdg/xaxugufewowiro.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/kugeka_sekurufife_vemonis.pdfIn PDF document text
    • https://zelubofiwexuf.weebly.com/uploads/1/3/4/2/134234915/735bdf9.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/hwgcfzE/95074716184.pdfIn PDF document text
    • http://lolafoduluj.22web.org/i_have_already_informed_meaning_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/jiiijjb/ruwigiwerosudiza.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/1761249.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/wesezuzuvalirik/sejixosetekos.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/wukuxujowozanet.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/preventive_maintenance_schedule_template_excel_free.pdfIn PDF document text
    • http://zilapiwet.epizy.com/subukizuwufedofinolew.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_off0000da7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 5132 bytes
SHA-256: 45244a8eb4f951efc462fb257f8f8a970bafd757c55e88a1b560be32408c4217
font_01_sfnt_off0000ec23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 10620 bytes
SHA-256: 13989ea44f9f8936f1e7cf8f6e1389a7f976d1565bb6c845fba71a8eec4754be

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