Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e523eee21a6067…

MALICIOUS

PDF

83.1 KB Created: 2021-03-03 01:25:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c87f36e2106ba0b05ad21da8eadab7a5 SHA-1: 58e3f107dbc8623174abee654b19ada0298a1257 SHA-256: 88e523eee21a6067b3339892de10466ef8cdcd86abf6d50d2f655d5d2578c1e9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though partially obfuscated, appears to be part of this lure, directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=how+much+electricity+does+a+1.5+hp+pool+pump+use PDF link annotation
    • http://bovewitavivebu.getenjoyment.net/gonitubup.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/how_to_get_in_the_welders_union.pdfIn PDF document text
    • http://navalny.design/manuales_juegos_wii243zj.pdfIn PDF document text
    • https://sipovabamekejo.weebly.com/uploads/1/3/5/3/135391609/kujevawis.pdfIn PDF document text
    • https://cdn.sqhk.co/zisazege/eSpjhQw/spine_deck_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/hjFJokr/top_warship_games_pc.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/15367748806.pdfIn PDF document text
    • http://like-store.site/vupopoxagubivo5gw.pdfIn PDF document text
    • https://risogaruwakev.weebly.com/uploads/1/3/4/6/134634919/nujewanob_runozewegonof_sijikewivise.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/Lic9jgk/oscar_grant_girlfriend_and_daughter_now.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/2006_bmw_3_series_owners_manual.pdfIn PDF document text
    • http://presalon.xyz/what_is_an_invasive_species_and_how_can_it_affect_an_ecosystem32i32.pdfIn PDF document text
    • https://cdn.sqhk.co/fojufifef/2IMu9ji/fajutuxel.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/hhrcjgA/facebook_messenger_games.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/32708790199.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/jfUgyJ0/69100993897.pdfIn PDF document text
    • https://cdn.sqhk.co/zubixola/fjcyjgE/regujavana.pdfIn PDF document text
    • https://duxojavuse.weebly.com/uploads/1/3/1/4/131483254/zibewonuvite_susarubexitiw_fipikod.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/DzibghW/sodusus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vebusatoro.atwebpages.com/oracle_pl_sql_tutorial_point.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/zebra_g-series_gk420d_software_download_mac.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/how_to_build_a_septic_tank_leach_field.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_off00010632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10632 5676 bytes
SHA-256: 2316b5224ab30c02b5c962841305f22b12d8667e77baa34438e879160e43bde4
font_01_sfnt_off00011974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11974 10740 bytes
SHA-256: 8406a482b83186184d055194520cd7459e19ea3658552d4bfce3d7fa4efc90ba