Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64513f599c09d20…

MALICIOUS

PDF

80.5 KB Created: 2021-03-09 19:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6b154be7f4499642a8748dc25865a47b SHA-1: d4c72c53ef6013d7b970d2f02d5d05ae56ad6c32 SHA-256: b64513f599c09d204a9c2ea2235ae014fdbc625d0812fe0b2908044f7fb0ca7e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ponafet.ru/123?utm_term=serotonin+rich+foods+pdf PDF link annotation
    • https://cdn.sqhk.co/potiribuwuf/5gjZVjb/movies_anywhere_activate_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/IaUiiAs/rebels_and_redcoats_huntington_wv.pdfIn PDF document text
    • http://mafibironido.22web.org/descargar_zacarias_ferreira_musica_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/giP3brZ/first_grade_math_worksheets_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/hchdHFQ/stick_war_empire_online.pdfIn PDF document text
    • http://mutinujevax.22web.org/fumivumali.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/bQPb4Tn/12852501296.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/geeojfz/corporate_strategy_definition_history.pdfIn PDF document text
    • http://zonixutazexe.iblogger.org/heaven_vc_andrews_movie_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/iTicibv/iphone_11_lock_screen_image_size.pdfIn PDF document text
    • https://cdn.sqhk.co/nanijamu/npDjj19/piano_lessons_video_download_free.pdfIn PDF document text
    • http://lewuzuxeluxe.22web.org/electronics_mini_projects.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/bRBmjaq/43233942311.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/c0gcieK/playstation_5_for_sale_amazon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siporoxa.rf.gd/free_call_app_for_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22b53f0-cbc0-4c8c-9c3a-181b159176ae/91841513739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ebd651f-1779-4dbb-874f-f04a528a1687/36279246312.pdfIn PDF document text
    • http://mexokibalu.epizy.com/31017577255.pdfIn PDF document text
    • http://foxadawimuwewar.epizy.com/93408549631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61eabbc7-ad92-48dd-977a-8a1c042d9ce2/bidularawar.pdfIn PDF document text
    • http://zasaraba.epizy.com/rasiseveli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4990027a-abca-4526-a056-f9a6f76a63d2/garmin_vivosmart_4_activity_tracker_small_black_slate.pdfIn PDF document text
    • http://sidakofonol.epizy.com/sct_livewire_ts_5015_update.pdfIn PDF document text
    • http://dizibabazuvuxu.rf.gd/sociology_topics.pdfIn PDF document text
    • http://dudulexo.epizy.com/98752733724.pdfIn PDF document text
    • http://jegajumofi.rf.gd/pevirutesotuwisalisilegel.pdfIn PDF document text
    • http://naratide.epizy.com/74347180316.pdfIn PDF document text
    • http://liwumakagizir.rf.gd/verb_in_present_continuous_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72d1966-2c47-45eb-b42f-ebedab2b8e7e/7461545162.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_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 5104 bytes
SHA-256: e3a2f61731d963bffaad860d584314fc4228b1731df4f33cd8a9ee988d193c7b
font_01_sfnt_off00011088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11088 10444 bytes
SHA-256: f5257bba1bbdc82d467f7bbae2acf9b802cca03a356ce37db75b7918dde4b29c