Malicious PDF — malware analysis report

Static analysis result for SHA-256 81901acc8fda40af…

MALICIOUS

PDF

70.5 KB Created: 2021-02-26 03:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ea68157c2021195ec0e0c91da7497dc1 SHA-1: e7a2d20179a6ca4a14502fc70a003d93439ad1e8 SHA-256: 81901acc8fda40afac046eb3b16c479a826ccc8c1e48da173d5ac7c97761e1df
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://crophysi.ru/award?keyword=naz%25C4%25B1m+hikmet+ran+%25C5%259Fiirleri+ek%25C5%259Fi+s%25C3%25B6zl%25C3%25BCk In PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/terevirewuw-momonagejo.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/derisadorobunul.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/eleanor_and_park_summary_no_spoilers.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/fPh51Ni/96516322529.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/suzosifuwezowa.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/jfyQjbm/7610428488.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/ramuvifok.pdfIn PDF document text
    • http://rubeatyshop.xyz/300029227453hoii.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/mecanica_vectorial_para_ingenieros_dinamica_10_edicion_solucionario.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/51993994254.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/87090674433.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/calendar_2019_november.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/xufuzuwagazuzolitizobe.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_off0000d467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 5548 bytes
SHA-256: c055c6b8f9e497146b532b66b93e76d0c5e01f12beba86054e7e28be23b94168
font_01_sfnt_off0000e62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62B 11720 bytes
SHA-256: f3403469481683e379871479f105854442b545a250da11f022d2e5cac3f7186d