Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc231e76b3288f4…

MALICIOUS

PDF

75.3 KB Created: 2021-03-20 15:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 401ef62f3ceb757ec3873aba240ee913 SHA-1: b0ab5e81d2168bd78ca001a6fe7694b2ca7a6a31 SHA-256: 8bc231e76b3288f408f6579c2537c75ff105a60689d17def7ef83be92bc94538
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/award?keyword=caffeine+citrate+davis+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417809/normal_6022bb5d27d26.pdfIn PDF document text
    • http://sluzhba1.net/interesting_facts_around_the_world_2020evk9v.pdfIn PDF document text
    • http://geesecam.com/bepajijagua7f01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411708/normal_604e1b5f285f4.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/hgdjglu/gammel_karakter_kryssord.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/gipidugizelewaxit.pdfIn PDF document text
    • http://eurozone.pro/355077489123ftkv.pdfIn PDF document text
    • http://navaram.online/87371657128wrcv1.pdfIn PDF document text
    • http://50offstore.info/how_to_mount_wd_my_cloud_on_windows_10grakg.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/fjj0Chb/45992935708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5fde58e433723.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/boxalewijim/rules_of_the_game_neil_strauss_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/brothers_movie_in_movies_counter.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/how_to_access_management_reporter_configuration_console.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/latest_calculator_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/28731613619.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/is_my_cdl_valid_without_a_medical_card.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/xirawotapalegeserope.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/why_would_a_judge_appoint_a_guardian_ad_litem.pdfIn PDF document text
    • http://molujafit.atwebpages.com/12_bar_blues_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/55711960008.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/caracteres_chinos_libro.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_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 5080 bytes
SHA-256: f5401dee2876c2b04d8d08fd01aa12ca54a056812d4b202b76451414df219a54
font_01_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 10952 bytes
SHA-256: 2ba2561cc44bce67b5e025999f5fbf374c93f8dc4d8523dce111e414cd867802

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