Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e6d78f9ae3c347…

MALICIOUS

PDF

80.9 KB Created: 2021-03-02 07:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 26089f668d5491fc5cdb5e73d6d21e5a SHA-1: 8bd70b9abff52eff9079653355284da7800dedbb SHA-256: c8e6d78f9ae3c347bcbe8e18b6e6e773fcddcc0fd1998f9481b720e196a4d116
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as suspicious, including a high-severity rule for a suspicious link lure and a machine learning classifier indicating maliciousness. The embedded URLs point to domains commonly associated with phishing and malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://mezovuduw.ru/strik?utm_term=wheel+of+time+reading+order+new+spring PDF link annotation
    • https://cdn.sqhk.co/libewepigux/gijjpia/space_expedition_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/gcbFQtV/war_khalid_bgm_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/losegiro/gimdhgc/8031793239.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/21239974002s2qs6.pdfIn PDF document text
    • http://vinorama.fun/sample_agenda_meeting_templates_freegadxr.pdfIn PDF document text
    • http://zupubovogigu.iblogger.org/breath_of_fire_6.pdfIn PDF document text
    • http://ohota-ribalka.online/dungeon_fighter_online_wikisyk1l.pdfIn PDF document text
    • https://cdn.sqhk.co/soxoxefumuv/ihWhhTJ/subway_simulator_3d_mod_apk_android_1.pdfIn PDF document text
    • http://managerprogram.live/lovizutusumofapimoxexhxsq7.pdfIn PDF document text
    • https://cdn.sqhk.co/rujoremebi/cFhijjd/timikeselirijijuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/wxigpht/falonoxiwijadu.pdfIn PDF document text
    • http://zupebupinumupo.iblogger.org/55212254534.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/cihoMjb/308771320.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/hjj0ij7/death_worm_free_big_boss.pdfIn PDF document text
    • http://pressit.space/the_critical_slide_society_size_chartntsp1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lorenivi.rf.gd/vazasizobosotawavodigi.pdfIn PDF document text
    • http://pigozezidum.rf.gd/naruto_anime_ultimate_modpack.pdfIn PDF document text
    • http://suxijiwuxupan.epizy.com/the_maze_runner_ending_scene.pdfIn PDF document text
    • http://bupukulepunaz.rf.gd/12184881226.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/greek_gods_and_goddesses_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/budget_planning_spreadsheet_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/momurobejivopepositel.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_off0000fe18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE18 5560 bytes
SHA-256: 156df1c2b4510fec4a586e93af013b122c5e7bc7b6ba11314748effcd2766517
font_01_sfnt_off000110f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F0 10816 bytes
SHA-256: 7f9cdf1ae0982f8d45b6726945174370889d420de8a559d334598417780a3ddd

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