Malicious PDF — malware analysis report

Static analysis result for SHA-256 099c4bec7c90c84b…

MALICIOUS

PDF

72.6 KB Created: 2021-02-25 07:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: e69d03145f29f00a65d206d4970de5e8 SHA-1: 7cdae8c1d349d2c9547fb879478304367c64705e SHA-256: 099c4bec7c90c84bbf36eec3723504d906f08352b941adc0b8d059ca7fd97bde
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=database+administrator+job+interview+questions In PDF document text
    • http://keepxufi.space/32840593541lztoo.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/9dqlcn2/21279297833.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/jigXKgj/59822193994.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/gdYNjjE/piruputakajirivurizep.pdfIn PDF document text
    • https://cdn.sqhk.co/sozovoja/5Zhwkig/22433602078.pdfIn PDF document text
    • http://teaapple.space/67906219001578ap.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/how_to_setup_scan_on_hp_officejet_4630.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/bUPhjgg/fashion_girl_clipart.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/Ptsjbje/34371956104.pdfIn PDF document text
    • http://doxisolawasusig.66ghz.com/chaos_group_license_server_information.pdfIn PDF document text
    • http://sagewusibuz.iblogger.org/mejor_antivirus_online_para_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexowiwoputam.rf.gd/arma_3_size_2018.pdfIn PDF document text
    • http://xopapodi.rf.gd/zelubokuxod.pdfIn PDF document text
    • http://disetorabagubed.epizy.com/journal_citation_reports_2018_release_date.pdfIn PDF document text
    • http://daporanil.epizy.com/mister_brahmachari_songs.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_off0000df79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 5432 bytes
SHA-256: 059b9329ef602854f2b044a423deedb2fb52700aa5e22781c498efce139a3e31
font_01_sfnt_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 10392 bytes
SHA-256: 8b86ac59bf565dd7c7c85cfa57f3e5aaa96a433931aa8f47076f264e1e160a8e