Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d81555ac576246f…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 05:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: aa8f69c2e7cae993942a15fef72be7c1 SHA-1: 355487076fd67290f828b6993ef44825de5c23b3 SHA-256: 3d81555ac576246f61eed1e978b8ac29b6dc8c05e77734946cc642eddc66437d
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/award?keyword=how+to+argue+and+win+every+time+free+pdf PDF link annotation
    • https://cdn.sqhk.co/jaxabofapuw/dgeyNf6/voice_assistant_always_listening.pdfIn PDF document text
    • http://1xbet-regi.site/744284749263a6ew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_600e74d66d265.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/hd0gcgc/47165927112.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447649/normal_5ff9b72cf09e2.pdfIn PDF document text
    • http://dorightpress.com/usb_endoscope_camera_software_free_macd883r.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/jbUick1/60035329825.pdfIn PDF document text
    • http://montana-media.com/organic_chemistry_3rd_edition_david_r._klein_solution_manualrm6q2.pdfIn PDF document text
    • http://goldenframecollision.com/45386089418j7q6a.pdfIn PDF document text
    • https://cdn.sqhk.co/piwizogir/ghjihdd/31929133326.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/xowasosuf/creditor_balance_sheet_item.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/one_piece_battle_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/tumum.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/create_website_template_in_html.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_off0000e1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 5368 bytes
SHA-256: 011dc0f5e66fc0cfc232ca357e6bb4728544ba64ac1e0df0648d6e1985554b6d
font_01_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 10156 bytes
SHA-256: e0eac5e9c6d26b9452c83381f31b99ced1457f2a7939f1f77299207684a3e8dd