Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c6227e01c6e530…

MALICIOUS

PDF

92.3 KB Created: 2021-10-11 02:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 107c94059064202dc5e02a0e1feecda1 SHA-1: d291d41edf396e0a5a7a0450f642cc02b7080e87 SHA-256: 00c6227e01c6e530cffbc213546248d1104bb85e8305ce45d0c458aaf1b26143
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://ketchas.ru/uplcv?utm_term=10+major+signs+of+the+day+of+judgement PDF link annotation
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134303bf3627---72787611515.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/dawukozudijivig.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/88522940093.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/gadanigadisov.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/tabivewefumarogagades.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/93403760449.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/jogaguvoxemimi.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///xibopizixadulitukerorapi.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/57755208695.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/wupapozamonovedurewugusix.pdfIn PDF document text
    • http://stagticket.com/fck_upload/file/virateligevubikarato.pdfIn PDF document text
    • https://tarsiman.ee/files/file/dapejuzalavowufe.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/93919443147.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/28836220131.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/kuxaso.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/kekisizugakekorexiwasal.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/sinamibebonajukujulalupu.pdfIn PDF document text
    • http://hmed.vn/upload/files/85566250646.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/5772182871.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/lakavamilojadebu.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/bizalulidimop.pdfIn PDF document text
    • http://atomleasing.ru/media/File/musabu.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/14180143865.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 11176 bytes
SHA-256: 401e0ef2e88c5f21b8611a90b88a3cffc0f43caab341e2c9744efae7bdc87955
font_02_sfnt_off000134af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134AF 18144 bytes
SHA-256: bcc46a44c619d261764b5f115cf44745f3360afda429315271c7c6c7911f358d

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