Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebac5b74a06cbe46…

MALICIOUS

PDF

78.4 KB Created: 2021-04-06 22:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 46a14c9346796683a08e9819b2f38236 SHA-1: c47019c625076224c4ab8575bcb7a588dcfada0f SHA-256: ebac5b74a06cbe460a20cdb4c05c7db2c67ddbf1e733a5b8a7664b4938ec0541
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=age+calculator+apkpure PDF link annotation
    • http://nesapumedavemag.iblogger.org/79244929820.pdfIn PDF document text
    • https://wanitovamuk.weebly.com/uploads/1/3/5/3/135303456/xifupejiwapiz.pdfIn PDF document text
    • https://cdn.sqhk.co/nivusenavazo/RL0INlA/egypt_old_kingdom_game_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/heQgdhh/84826886016.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/5670387975.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/gepedusawe.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/xuxorabis.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/bqjSQhi/glass_ice_breaker_games_for_meetings.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/PjjR0jj/can_you_order_mod_pizza_online.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/ggiiify/mekiwinagaxanib.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/cF4yiiC/17788772020.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/the_sims_3_ambitions_cd_key.pdfIn PDF document text
    • https://cdn.sqhk.co/losegiro/jURjjgh/find_my_friends_phone_location_by_number.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/caribbean_cookbook.pdfIn PDF document text
    • https://lolizafopig.weebly.com/uploads/1/3/1/4/131453679/8680396.pdfIn PDF document text
    • https://cdn.sqhk.co/tonukabonuwe/fibuhbn/timeline_template_powerpoint_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nezarokex.epizy.com/63724711695.pdfIn PDF document text
    • http://kogotiru.myartsonline.com/annie_leibovitz_books.pdfIn PDF document text
    • http://xonezerimagu.rf.gd/apache_camel_essentials.pdfIn PDF document text
    • http://wegejubofiba.rf.gd/transform_fault_boundary_definition_science.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 4704 bytes
SHA-256: 5d9f8b7252b5ade7cdfefe614dc6c4fc8d5364c58ef4c5eada7911f49fb5c3b1
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 10940 bytes
SHA-256: 5d0fec84986b38e363ad8ce9f4e00fdfa074ed9a4dc780a31be49e46ac48828c
font_02_sfnt_off00011e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E76 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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