Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad42a6ca3f447c26…

MALICIOUS

PDF

74.5 KB Created: 2021-03-06 03:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 79534e384b1079ac680e0b8a06e01895 SHA-1: 36141af0b892b12a521eea2e0ac7ff5aadefcfef SHA-256: ad42a6ca3f447c26b911bf788f761f93e618ec4c3fd1c8e1a3b0d45e5f67df50
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://fokemale.ru/wix?keyword=parts+of+a+plant+worksheet+3rd+grade PDF link annotation
    • http://hellochildren.online/the_magic_barrel_short_storye0d5q.pdfIn PDF document text
    • https://xelegiri.weebly.com/uploads/1/3/4/4/134435730/8680266.pdfIn PDF document text
    • http://0fruits.space/bonds_baby_size_guide_australiailf6w.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/icjjDeB/62683164953.pdfIn PDF document text
    • https://didilajuti.weebly.com/uploads/1/3/4/5/134585724/9697002.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/vhegAhb/ice_cream_cone_making_machine_in_kolkata.pdfIn PDF document text
    • http://circulyarkadigital.xyz/pathfinder_druid_feats_listxq0vp.pdfIn PDF document text
    • https://vovazukaliwo.weebly.com/uploads/1/3/5/9/135962855/datik_remukowoz.pdfIn PDF document text
    • http://itanah.space/lista_de_los_derechos_humanos_de_los_nios_y_adolescentes1wywb.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/pmgjSEB/the_bowery_nyc_bar.pdfIn PDF document text
    • https://diwejixa.weebly.com/uploads/1/3/4/6/134629966/mezegexusi_wuxugatu_mazodufe.pdfIn PDF document text
    • https://jonumupemusegiw.weebly.com/uploads/1/3/0/8/130874210/jisot-nazuj-renezelosopaj-pivufubevid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d2fb4c-e73a-4ee2-9d34-91658d06e96c/70832726813.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/himeji_castle_fgo_farming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/star_trek_enterprise_episodes_ranked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597f7aed-0c7b-4e25-865c-a3e8711ae98f/tanojufofifu.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/muviwotiwusemedakuzito.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/27791626787.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/mission_mangal_movie_songs_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/60409018497.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/tinker_island_mod_apk_1._4._32.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/xofejebewuguwebokigudute.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_off0000e4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DD 5624 bytes
SHA-256: 6aab95dd3e2f513d417cd47b93e23b0cbf06ebad34d47ea02bc6c1919cac4a6e
font_01_sfnt_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 10708 bytes
SHA-256: 4817178ed7714aabdbdd281d6bfbb092af5bff6a0b0f774900d188ec20d6fcae

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