Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed134f1636d2056…

MALICIOUS

PDF

70.0 KB Created: 2021-03-09 20:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 24d0eb21f5ad7f364ae67e775cfc6763 SHA-1: 9e8d767105b61ec538fc94be597a6b86dcb4bd0c SHA-256: 5ed134f1636d205679818739a3d719f541d7c9dcee1677fb698633489c94ec82
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=nec+dt300+transfer+calls PDF link annotation
    • https://cdn.sqhk.co/nedabuke/e0ggGxW/238619936.pdfIn PDF document text
    • http://worldthailand.fun/after_effects_templates_logo_reveal2t4fq.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/hbDO7jg/run_as_admin_command_line_shortcut.pdfIn PDF document text
    • https://cdn.sqhk.co/kelufuro/xJ4wohc/free_printable_calendar_december_2020.pdfIn PDF document text
    • http://copyright-notice-ig.com/992050648947tmkk.pdfIn PDF document text
    • http://prosale.company/las_vocales_para_imprimirno0nh.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/LhaMhfH/get_in_shape_at_home.pdfIn PDF document text
    • https://bowotile.weebly.com/uploads/1/3/4/7/134759747/faguguxeni.pdfIn PDF document text
    • http://resimpub.com/rotten_tomatoes_best_movies_2018_netflixuts3r.pdfIn PDF document text
    • http://good-production16.site/make_your_own_xbox_one_controller_shellhuw5m.pdfIn PDF document text
    • http://stnold.com/dumuwofow5raiq.pdfIn PDF document text
    • https://bativazuwa.weebly.com/uploads/1/3/0/9/130969541/2744540.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/jbqdiia/babomobunulolom.pdfIn PDF document text
    • http://tricitysikhs.com/jolefexukobffhnv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59d5801-6e89-4022-9fe3-1d584103fb35/ashton_hagans_nba_draft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f30ee9f-62f0-4358-b123-83db8c9ebef9/mtv_challenge_inferno_2_full_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c80d2a3-eaf9-442c-89d2-5ab74ca5b249/vegibumefopobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac5eb04-86b6-4379-bac2-fac145006f72/68355204043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b6ccc6-5551-410d-859f-c433e3fc0c7a/53589540728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e92ae2-8ead-4601-a31a-2d3ac395d6a3/ipod_home_mini_commercial_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5038d678-ad9e-4581-aa3e-d0d1b695e232/saitek_joystick_x52_pro_manual.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_off0000d577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD577 5288 bytes
SHA-256: 0c97810949ac418517ab5f523a19eba84b738d85c095c9008282e0730a333b8c
font_01_sfnt_off0000e788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE788 10308 bytes
SHA-256: 339eb505433c78fd084f189cd8187815ddb970514ffd11b14fdc69d253910f72

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