Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee71ebf84e79238…

MALICIOUS

PDF

77.5 KB Created: 2021-03-21 04:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 00c0f8eb09d9d30e869289a395f101a8 SHA-1: c1e90b2f9194e3eac14b1e0ef446f462ef373931 SHA-256: 8ee71ebf84e79238739296173143009e36050f717f51469ec0d1bd3a50033fd7
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to exploit user curiosity or search behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/award?keyword=butterfly+bts+piano+pdf PDF link annotation
    • https://cdn.sqhk.co/jesotipo/egdjehg/30647310844.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/jjjhejf/does_exocytosis_use_active_or_passive_transport.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/ciisTUx/zuvutodixexopegunitub.pdfIn PDF document text
    • https://cdn.sqhk.co/noruwotil/hjY7iiH/speedometer_app_for_android_tablet.pdfIn PDF document text
    • https://cdn.sqhk.co/xatuxazaz/PhiFahe/94606689764.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/UlggKho/fujojasaduxabomoraxudulo.pdfIn PDF document text
    • http://pshcomonhere.xyz/7663637879338046.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/F9jeoii/525_east_front_street_plainfield_nj_07060.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/biiiiib/gilotoginovebemuwen.pdfIn PDF document text
    • http://afracheat4.xyz/a_random_walk_down_wall_street_12th_edition_downloadoyrc5.pdfIn PDF document text
    • http://salonhq.xyz/biocidal_product_regulation15es7.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/zarusegibitumet/26391715588.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/37476078949.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/najopige.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_b9ef73c43eb742a790887a55fceb780c.pdf?index=trueIn PDF document text
    • http://folalolitawos.epizy.com/how_to_use_voice_guide_on_samsung_tv.pdfIn PDF document text
    • http://revikir.epizy.com/la_casa_de_los_espiritus_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/nuwobife.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/69375566676.pdfIn PDF document text
    • http://jugikan.epizy.com/android_sql_server_database_tutorial.pdfIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_18706e138dff4395856aced15c49a3bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/spelling_power_grade_7_review_lesson_1-4_answer_key.pdfIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_61a53a7e49ce4595a19ebeef605dced0.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_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 5324 bytes
SHA-256: d2b86674dd89ec0b18844cd1de77887bd8bc9abb1893f5a01f52059c33c7a6a8
font_01_sfnt_off000101ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EA 11672 bytes
SHA-256: d8891b9d2bf5aedd942a73e63cbeadae29102a9aceb698ab40f2cddc015db907