Malicious PDF — malware analysis report

Static analysis result for SHA-256 00596578965ed9e3…

MALICIOUS

PDF

80.5 KB Created: 2021-05-06 22:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a58e0fc0c49c742e410928da05892063 SHA-1: 12beb0da487179717fd1e86c597bbca9dbd3b3ba SHA-256: 00596578965ed9e3dcf1135bd02ea4a1101660487cc41d56d76a2e21cb0c8983
156 Risk Score

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 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 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://leonvi.ru/strik?utm_term=xin+vang+chords PDF link annotation
    • https://folowobudeguw.weebly.com/uploads/1/3/6/0/136051819/8123832.pdfIn PDF document text
    • http://shopsmmv.site/jungle_adventure_game_download_javagtema.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/ielts_fever_listening_test.pdfIn PDF document text
    • http://raftgjgr.space/zotero_annotationjsfsb.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/base64_to_in_php.pdfIn PDF document text
    • http://repair-kompov.ru/wakagozipujevumoglwrru.pdfIn PDF document text
    • http://fodekofuxuvum.sportsontheweb.net/after_livro_4_tumblr.pdfIn PDF document text
    • https://pafegesufo.weebly.com/uploads/1/3/4/7/134719460/sosigonemuk.pdfIn PDF document text
    • http://hookup668.site/what_is_the_ultimate_goal_of_progressivestm1y3.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/essential_mathematics_for_economic_analysis_solutions.pdfIn PDF document text
    • http://gratoramaa.website/chip_and_dale_rescue_rangers_nes_manualc1ixw.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/nagudo/lubitunejezexapimig.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/left_knee_varus_deformity_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/is_zyxel_c1100z_dual_band.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/marlin_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/windows_7_ultimate_kms_activator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/zofogiwilutaj.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/vofozexij.pdfIn PDF document text
    • http://sulorowanutabu.atwebpages.com/regibovaguxojaxeveviga.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/86457894397.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/how_to_replace_ipod_touch_4th_gen_battery.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_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 5208 bytes
SHA-256: 63090a831bc1be0f352d52320b18d13c921f09a4566cccf02180d3b72350283a
font_01_sfnt_off00010195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10195 22992 bytes
SHA-256: 0a0c7c7136a01aa5f6eba6547a533e35d1c356c79399a78d87a387c436c89638

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