Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3e6e7815b4eaf8…

MALICIOUS

PDF

86.1 KB Created: 2021-03-22 09:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f8a543196990c4dc6123cd2db6af0af7 SHA-1: 553c36b6f471461fd5776083f42926cbf6e897f4 SHA-256: ce3e6e7815b4eaf83213e036ef4f88ef0e300341530ef0645116467d766bbeb9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to search terms and file types, reinforcing the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://soxebez.ru/123?utm_term=coraline+neil+gaiman+book+pdf PDF link annotation
    • http://bioforcecolumbia.site/asrock_z77_pro4_specsu16zu.pdfIn PDF document text
    • http://newberginvestmentproperty.com/free_online_games_unblocked_for_schoolzp9uv.pdfIn PDF document text
    • https://cdn.sqhk.co/jufenakajo/hahibia/40254519321.pdfIn PDF document text
    • http://swast-group.website/sacred_sword_princess_mod_apkqkrje.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/gakujamunefumujaku.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/allahabad_state_university_time_table_2020_bsc_2nd_year.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/marketing_definitions_a_glossary_of_marketing_terms.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/calculus_an_applied_approach_10th_edition_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/pgeNjaF/ar_drone_control_with_rc_transmitter.pdfIn PDF document text
    • http://kovativegapok.getenjoyment.net/vifebinowolixozibewiw.pdfIn PDF document text
    • http://anarchymedya.com/vufowenoniwuruzajpzlix.pdfIn PDF document text
    • http://it50save.info/goat_simulator_waste_of_space_trophy_guideh32a5.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/page_break_inside_avoid_dompdf.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/tibelat.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/j4zjhhg/40666357852.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/haAicgc/62193305125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/lemirevubuwuxu.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_646b686444644199b954e0a1faf8ff28.pdf?index=trueIn PDF document text
    • https://c3f0ce02-b953-40d9-b94a-e38a054f9a35.filesusr.com/ugd/7afb62_6473100e3baa46a294f44b3460a43676.pdf?index=trueIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_3402cdac4c594e3b8f3caa8658aade53.pdf?index=trueIn PDF document text
    • http://zepizevut.atwebpages.com/jukumolilewiwulozebuzo.pdfIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_7aa16807b9f24b0caaf0c331d33420b5.pdf?index=trueIn 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_off00010f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5F 5292 bytes
SHA-256: 15194b19b0e63272494e503aab2c5cc4d6fb52275b73a95a8fb0a8b89b7c6622
font_01_sfnt_off00012144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12144 12172 bytes
SHA-256: ab1d2a1387a8aff12dec2f8ebee1919d107a50dac26ed916dabfb12a83df652b

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