Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab30e93668d6887…

MALICIOUS

PDF

76.5 KB Created: 2021-03-29 08:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 896b9f5b2bc55ad68937b4ffb788a86e SHA-1: 5304668a0ecf0e0ca754ffb89b89e96b20cc4306 SHA-256: eab30e93668d688732003fd4dfcff2050e024ebb0367344288c4338ee098d9e0
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://xezojetit.ru/strik?utm_term=gram%25C3%25A1tica+y+ortograf%25C3%25ADa+b%25C3%25A1sicas+de+la+lengua+espa%25C3%25B1ola+pdf+gratis PDF link annotation
    • http://shtancircul.site/38640828571gdtqg.pdfIn PDF document text
    • https://cdn.sqhk.co/wexifidobafo/jekhhrH/carnival_games_wii_gameplay.pdfIn PDF document text
    • http://getplafond.xyz/replication_in_prokaryotes11v3y.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/sabovalojej.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/fixidoda.pdfIn PDF document text
    • https://cdn.sqhk.co/wifilivemij/at0Igf1/fanatical_basketball_mod_apkhome.pdfIn PDF document text
    • https://tejojobowadame.weebly.com/uploads/1/3/0/8/130874570/gerag.pdfIn PDF document text
    • https://cdn.sqhk.co/gunuzuli/E4vgdCb/one_top_up.pdfIn PDF document text
    • http://lebojabufi.medianewsonline.com/16641186774.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/HjeHig5/knife_hit_game_mod_apk_download.pdfIn PDF document text
    • http://italysummer.fun/stop_coddling_the_super_rich_summary7tpz7.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/w9iabEP/basketball_3_point_line_high_school.pdfIn PDF document text
    • http://nafigunagofadab.getenjoyment.net/74185858573.pdfIn PDF document text
    • https://midezotadodagof.weebly.com/uploads/1/3/5/3/135326840/ca856d.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/john_deere_110_backhoe_operators_manual.pdfIn PDF document text
    • https://buzomuzugagi.weebly.com/uploads/1/3/4/3/134313884/wiropumaditataz.pdfIn PDF document text
    • http://bonboxstudio.com/podelozomevufejiripakunf8xc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://riwexakax.epizy.com/misoprostol_figo_guidelines.pdfIn PDF document text
    • http://mepitar.atwebpages.com/25555911248.pdfIn PDF document text
    • http://redariwim.rf.gd/meperaxugeviforef.pdfIn PDF document text
    • http://vopapokolozanum.rf.gd/how_much_does_a_hearing_aid_cost_in_malaysia.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_off0000e654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 6248 bytes
SHA-256: 31da962a802079a422c41f36b4429f63f886c4d5ffb96733e3d822788c104756
font_01_sfnt_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 11872 bytes
SHA-256: f38369394675a21ea0d367e5e7e965c29764c8d829dfb09603e650f2636bed9b

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