Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a70b895f570b45…

MALICIOUS

PDF

77.0 KB Created: 2021-01-20 05:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: c51ab6d15f2794bdc40636bafcd1f632 SHA-1: 28b4e0ed36c4d4d78cc04c5d32c68e4403aea3e9 SHA-256: d9a70b895f570b450473ed2f725f7df897a56889ac3d892b392a0c5676280c9c
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/123?utm_term=ugly%2527s+electrical+reference+pdf+free+download PDF link annotation
    • https://kumajevebak.weebly.com/uploads/1/3/1/8/131856027/a16f5aa92a37d.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/shehcjg/redskins_logo_meme.pdfIn PDF document text
    • https://site-1198856.mozfiles.com/files/1198856/calculator_for_clash_of_kings_cokjj.pdfIn PDF document text
    • https://site-1219602.mozfiles.com/files/1219602/transfer_sim_card_to_new_phone_att.pdfIn PDF document text
    • https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/cba4aabee926f8.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/Higwjau/inherited_cardiac_arrhythmias_diagnosis_treatment_and_prevention.pdfIn PDF document text
    • https://bawosizegidaw.weebly.com/uploads/1/3/1/4/131411147/a319bf6cfc69ff7.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/NPOkUje/12515069790.pdfIn PDF document text
    • https://xonutupusuvulin.weebly.com/uploads/1/3/1/8/131871786/9338712.pdfIn PDF document text
    • https://site-1179214.mozfiles.com/files/1179214/zirafaxagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427105/normal_5f9ddd4cd9e7b.pdfIn PDF document text
    • http://movoxazukum.22web.org/king_size_fitted_sheet_dimensions_usa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5ffcc6029c261.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/nawuvud/history_of_tessellations_origin.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/45968356723.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_off0000ecb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 5544 bytes
SHA-256: 79f7bfa67394388f7a21dbe247eb7c6c57fa9e834433a699361869f7c9c4afd5
font_01_sfnt_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 11640 bytes
SHA-256: 1527626911826bb23ba19b7f9336f833407a86d0e741f733695b83ea562e5357