Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7504f273a915625…

MALICIOUS

PDF

78.3 KB Created: 2021-03-05 20:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2943361327925827cfb2ae5c7ec039a3 SHA-1: daf82a847908695cfc557d42c58ed9c0c55ec648 SHA-256: b7504f273a915625f3eff52a41573e979abbe175b5e724970cd09cdee628999b
126 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The PDF structure and embedded links suggest an attempt to lure users to external sites, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=2000+honda+shadow+spirit+1100+specs PDF link annotation
    • https://cdn.sqhk.co/tipefimex/hdGNhhi/splash_lagoon_hours_tomorrow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414486/normal_5fe4753f43725.pdfIn PDF document text
    • http://bio-ita.fun/xejovulunatufapigukaluboc3v2a.pdfIn PDF document text
    • http://knitfqph.site/haier_hlp24e_washing_machine3onj5.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/fwEO3KH/wedding_salon_games_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_603c5a8977155.pdfIn PDF document text
    • https://cdn.sqhk.co/rujoremebi/cFhijjd/timikeselirijijuwu.pdfIn PDF document text
    • http://teachersaid.fun/the_mortal_instruments_book_4_summaryq8pv1.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/WqSnhj6/most_english_premier_league_appearances.pdfIn PDF document text
    • http://koteyarn.moscow/beat_street_toy_store_winnetka3x6b9.pdfIn PDF document text
    • https://cdn.sqhk.co/nogugojuri/ibibVhf/battery_charger_harbor_freight.pdfIn PDF document text
    • http://tur8osale.site/wemanudokudwoia.pdfIn PDF document text
    • http://bu-markett.com/42882566440iusj4.pdfIn PDF document text
    • http://ellmax-site.xyz/92301809952l3foi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5ff181a1d7dd7.pdfIn PDF document text
    • http://beautysale.site/vanazudijaropash6h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476147/normal_600f9b2e37707.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/42fa19f7-a651-46b3-a223-2e3bff9ad191/ninja_professional_blender_1000_how_to_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a55066-8166-4c0e-bff3-57825d6319db/how_much_does_a_security_manager_make_in_sa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d9f4d69-bd9c-4dd0-8959-ca4949b08cf2/how_to_use_tenergy_tb6b_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee379644-23eb-4074-bc7f-07a8dc40c015/oedipus_rex_themes_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8281dcc4-a016-4491-8642-86e5786e89f4/safety_rules_at_home_for_4_year_old.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f1315f7-6cdd-42db-a3f0-91decd376f47/aircare_humidifier_fault_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0592b06a-5a68-44ec-bcd0-af8ce218a6c6/download_romantic_novels_free_online.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_off0000f022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 5452 bytes
SHA-256: 4b3f53c9cd06e8046154b499a0649433f6abc8ec2ec0804a03b21a46b0ec6fd2
font_01_sfnt_off000102bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 12644 bytes
SHA-256: 43a681ad736c747216616d5b6d5eb941a80be7f7e10d3687892798ff043d6405

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