Malicious PDF — malware analysis report

Static analysis result for SHA-256 2418cd0b7a017b7b…

MALICIOUS

PDF

79.5 KB Created: 2021-02-28 08:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cae8b2dab4cd0b97780a959a8ddc3a03 SHA-1: 90a1e027c6248ffd570e473e88ce061d7be5e7ef SHA-256: 2418cd0b7a017b7b2c97a9785f81ece3e945e66b1fe20fd252ca2f185b45337c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or unknown reputations, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=dfo+guide+mode PDF link annotation
    • http://form-copyrightservices.com/honda_2hp_outboard_shop_manualctfap.pdfIn PDF document text
    • http://4bochki.ru/2644071575asl8u.pdfIn PDF document text
    • http://bachanalytics.com/newoloveluvinosixabijog200cx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409417/normal_6014f68be6518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368243/normal_5ff79d474a509.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/i3V7iik/distance_meter_app_for_android.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/bajrangi_video_hdqoytx.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/Iqujdib/57579261820.pdfIn PDF document text
    • http://static-start.top/republique_dominicaine_meteo_punta_canan84ww.pdfIn PDF document text
    • http://datinge.site/daduzanugarexalaragacgsk.pdfIn PDF document text
    • http://blaugrana.ru/88920233010owlf1.pdfIn PDF document text
    • http://itdiscount.info/pierogi_kielbasa_sheet_pan3hrhf.pdfIn PDF document text
    • http://on24-system.club/telenovela_a_madrastra_capitulo_603h3sv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_60324bbab3026.pdfIn PDF document text
    • http://megatorg.ru/xepesegezawitikqtb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_5fe9a87da1a86.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/2FOeTU0/100_doors_world_of_history_2_level_35.pdfIn PDF document text
    • http://virona.org/juzowerofejl890.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
    • https://s3.amazonaws.com/xaliwalufoguni/22112002668.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/vidmate_old_version_1._47_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/levisidaxukuwuvetupo.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_off0000f006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF006 4404 bytes
SHA-256: 31cba09e6f0d555e431f8eec5a7e2078822da3c9cc2eeb8a0fea35851195a81d
font_01_sfnt_off0000ff11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 10344 bytes
SHA-256: 55f5b3f99c4c14350d2f782a427e5397335fc40fb0c92409dd9a30c350fa60d9
font_02_sfnt_off00012278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12278 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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