Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb29df1da7b49ca…

MALICIOUS

PDF

69.2 KB Created: 2021-09-24 22:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 796557e829be47b62144962bdb68ce14 SHA-1: c3c758e7626e03c565bf42d4d12c931460764e48 SHA-256: aeb29df1da7b49caf130635210028f6c5b7e867882c0b2161b2876ffbe0f321a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains a large number of embedded links pointing to various domains, suggesting a link farm or phishing attempt. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://xmzhj.com/UserFiles/file/27823179027.pdf In PDF document text
    • http://tpokebar.com/uploads/files/sejabonisovukavugopulu.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/lavugozevinegekol.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/siwisesiwibawatufonil.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210906184746925240tuv0d8.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/mejamomozumimo.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/dazidonafojubadodinuj.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/gogumixupemomuvivikavotep.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/sizogiduvuwuloref.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210923131900.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/fukomirulagavazusa.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/4664323853.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/nonapobilifagoruvogof.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/kiseloxewebagef.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210919055037.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/likebowadukukef.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/lodepavewojiboxe.pdfIn PDF document text
    • http://evola.it/userfiles/files/ratazumeligemu.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/vefanibejosoguv.pdfIn PDF document text
    • https://zlataraburmevuckovic.com/files/6585496499.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/3977102393.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/vuvodajavo.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/wowagibulexagebibel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=get+free+robux+by+doing+surveysPDF link annotation
    • 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_off0000b058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB058 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86A 14844 bytes
SHA-256: bc5d04f9e5faba4928b58e3d278e832988465195dc227c80e52d0201eafb0b79
font_02_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 10884 bytes
SHA-256: 1a103730df38f8b8d2607a161f2541662a03b834222310569fa9d18a9693635b

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