Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aee608543c3b9d1…

MALICIOUS

PDF

79.8 KB Created: 2021-02-18 07:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5bb4d66ffb20feab9856aa0e4f407130 SHA-1: f7d3364e970462d17c66daa13704b6bd1304e000 SHA-256: 5aee608543c3b9d1a8d22aafb5ee911ed41ec3999b3e2509dce4d814a9275a93
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=rca+universal+remote+codes+for+sanyo+roku+tv PDF link annotation
    • https://cdn.sqhk.co/numavagoko/Nhjjbih/meme_wallpaper_hd_1080p_desktop.pdfIn PDF document text
    • http://salopkisa.website/guia_aceites_esenciales_pranarom69z9b.pdfIn PDF document text
    • http://cyberghost.store/George_calombaris_thermomix_receptend0rlh.pdfIn PDF document text
    • http://znakomstva69.space/propensity_score_analysis_statistical_methods_and_applications_second_edition3p6gz.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/Yja7Aib/rope_hero_vice_town_apk_download.pdfIn PDF document text
    • http://astropsychology.website/como_hacer_un_asador_de_ladrillo_con_chimeneati5qw.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jahjzja/juicy_fruit_gum_commercial_song.pdfIn PDF document text
    • http://rewita.fun/ilyada_ve_odysseia56mf2.pdfIn PDF document text
    • http://nout-sale.site/amcor_tc120_dehumidifier_manuala204w.pdfIn PDF document text
    • http://wonnaturila.space/fps_cao_no_root_apkrs0xa.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/2BjchdD/blue_marble_travel_agency.pdfIn PDF document text
    • http://pudobatawizubi.iblogger.org/42565675569.pdfIn PDF document text
    • http://leafester.online/275762029837r987.pdfIn PDF document text
    • http://avlto.best/tezopawilikowivokunbgy4.pdfIn PDF document text
    • http://agent-ritual495.online/kosijexidagiv621z9.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/jowutoneranemuk/conception_2_fuuko_conversation_guide.pdfIn PDF document text
    • http://domulogud.epizy.com/wozavodenefobaba.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/getisodamepabarexo.pdfIn PDF document text
    • http://nupawibufa.epizy.com/que_es_anemia_celulas_falciformes.pdfIn PDF document text
    • http://fejivexol.epizy.com/nupuviwefiwegekimi.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_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 5400 bytes
SHA-256: 8ae44660418affc9b9cd7d0067241f1b9db1959edd0592718cd2371b13023b17
font_01_sfnt_off00010f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 10052 bytes
SHA-256: 5458203bb2010070364194e81b519ad4b249e045330c13fb689ba18cb897f342

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