Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c502cd522dba2b9…

MALICIOUS

PDF

72.3 KB Created: 2021-03-04 06:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fe30ca8f79917e6d65780264bc90d0c9 SHA-1: 7cfcf05aee65795e4613eaeda3d5164f9a99a1dd SHA-256: 1c502cd522dba2b9964526bc0fd6cd7a5d719ce8c009330aed74225c0d2f0f38
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://gimoguvi.ru/wix?keyword=8+column+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449779/normal_5ff415ea1ca1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529977/normal_603370997fe1b.pdfIn PDF document text
    • http://teksalon.xyz/android_apps_creatort41ne.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449193/normal_601ef8e049cf0.pdfIn PDF document text
    • https://zajanitemamivow.weebly.com/uploads/1/3/2/3/132303208/misakagego_zibelokivukib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_60336ab39452b.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/human_body_systems_and_their_functions_quizlet.pdfIn PDF document text
    • https://fojanatixisi.weebly.com/uploads/1/3/4/2/134265346/punosusigexe.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/wupixufekijax/handwriting_sheets_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/why_cant_i_connect_my_epson_printer_to_wifi.pdfIn PDF document text
    • http://rajixubododafu.epizy.com/airplane_cartoon_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/vavuxuwuda.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_off0000e0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BD 5084 bytes
SHA-256: a43af8844b6c0c1f6d140a3a0cbbd2b2b34da643820250e4e5bc3a818196861b
font_01_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 10240 bytes
SHA-256: 46c24fb53dbc67f23b7f49fb615b19f56f51a500f0265e8e0225309eac059c8f