Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce99fe0fbfd9515f…

MALICIOUS

PDF

86.5 KB Created: 2021-03-24 12:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5eabd2686ccc76b83e142d4f3015846c SHA-1: 58627545718df3522a496a3f4cf52c12d0d20653 SHA-256: ce99fe0fbfd9515fa0188d9f756b1f74a8f2144f1d6b6bc0f67e7860759cda66
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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/wix?keyword=the+final+empire+pdf PDF link annotation
    • http://sufawevugut.mywebcommunity.org/wofanilamel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468289/normal_5fdc723865e7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488574/normal_5fddd8be4bb91.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/86490549530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499935/normal_601b602f90f73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_6030cba584351.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/buliv.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/livro_antes_de_partir_colleen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_6028f009aeac5.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/4ee40a04-eb47-4100-a7cd-8d7f6355fd9f/89138097312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2758aa2-7229-44b2-83a4-d7419ca7a623/23065360871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dab90be-62a9-4336-9cc5-a04c8d593316/71305913831.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/27879837512.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/aadukalam_video_songs_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/vusigili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f566f47b-9479-4af3-913c-4cc30f6c4cba/59859309022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceddf75e-aa55-457a-a18f-ef9c8a2613e1/92869707787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48288678-e27f-4dc0-b37b-3b9217c399d6/bubasitowuxifugeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85aeaeb5-ced4-480d-8f98-9518bb987dd9/princess_bride_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/printable_barbados_passport_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/38243850989.pdfIn PDF document text
    • http://tipokeviti.atwebpages.com/6402844616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55734aae-48bc-4096-b2cc-3e6b450f51ae/mijixab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4cd09b-123f-42d7-b56b-2af757e70ddd/palevidetamumijileluzawux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b436aaae-a7b5-4b87-b069-b1a486d25a18/how_to_day_trade_forex.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_off00011675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11675 5052 bytes
SHA-256: b6aa23210ab7109646f31e1f5b1826bb28f70a411919c884b9046194e78ce2af
font_01_sfnt_off00012775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12775 10944 bytes
SHA-256: 31a63d70da0854516607e18b361df070294792f79eb2078d6280104aa4ac2f15

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