Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb47a872a8223fd…

MALICIOUS

PDF

74.7 KB Created: 2021-03-29 06:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 00ec6552a2aef9d496d481d84b83ee74 SHA-1: c3b2621153b712f7b0ac4d9db9f1329e2b9556ee SHA-256: 9cb47a872a8223fd40c07fe9b19a28593b45edf6577d89798f03bb323ea0faa5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URLs, many hosted on disposable domains, suggests a phishing or scam campaign designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=acknowledgement+of+debt+template+pdf PDF link annotation
    • https://cdn.sqhk.co/zubuwebofe/3jbIgeA/pokemon_kanto_black_kbh_games.pdfIn PDF document text
    • http://kitazixozakabu.sportsontheweb.net/inteligencia_multifocal_augusto_cury_espaol.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/61270235418.pdfIn PDF document text
    • http://sarawavenudiwap.mygamesonline.org/zaxenabe.pdfIn PDF document text
    • http://gopagafab.medianewsonline.com/neet_answer_sheet_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/sulugedako/ccIOji0/61232765367.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/pvYhdjd/60228183347.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/cesium_chloride_structure.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/ggEhakD/prison_break_season_4_ending.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/bunegev.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/2040033770.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/65912695378.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/hh2Xlhb/real_hospital_games_virtual_simulator_dream_docs.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/botulisme_traitement.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/modern_admiralty_law.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/HiaiaGM/3019507332.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/MighhdU/planet_pictures_in_order_from_the_sun.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/37653863663.pdfIn PDF document text
    • http://duzixofiwisegi.mygamesonline.org/xebokaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pikubub.onlinewebshop.net/cloud_9_volbeat_lyrics_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/gunetubijupeno.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/totupoxoniw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA56 5228 bytes
SHA-256: 1b5b438826dd5ccb9154fbe86d7346ba4ea2f3e41a3d57554a0ae434fd0cfedb
font_01_sfnt_off0000ec19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 10292 bytes
SHA-256: 6b0fec65b9a39d3cb7384b34f637ab86287835de542ecbb699aa9f0324467699
font_02_sfnt_off00010f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F40 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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