Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3d43c341c6d78e…

MALICIOUS

PDF

77.8 KB Created: 2021-09-19 07:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: df9f8a3c2e9dc023d52e1c74acb31bf6 SHA-1: ddcc88699f99662a4a1fb9d0d0ac864314c7cb75 SHA-256: 9d3d43c341c6d78ee7ae2d0fb86f5dc3cfd23fb1a59b797a812e7f37da800f38
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document was flagged by an ML classifier as malicious. It contains a large number of embedded URIs, many of which point to external sites, suggesting a link farm or redirection mechanism. The presence of 'utm_term=vidmate+application+download+2019' in one URL indicates a potential lure for software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16136e74d4b9a8---17694571980.pdf In PDF document text
    • http://escrima-rlp.de/userfiles/file/pabejasiwujogo.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/79729839236.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/dupobikumof.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/rasoxitatonesaj.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/11152268779.pdfIn PDF document text
    • http://napiarsaigh.com/images/xigitabuwebumoxajokuj.pdfIn PDF document text
    • https://zagi.hr/files/wawaleludewij.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/kupamejatidorawezo.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/27509867013.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/6713688260.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/niwarejivos.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/zekozinafof.pdfIn PDF document text
    • https://medius.sk/userfiles/file/24436118107.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/surevevimale.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/7212331261.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210910_7A0F4EED6EDE5143.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/jujefitalulejevibadipanu.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/7q7bplrjbvkupffj51lbsdki82/libuluxixubewoxiziwaso.pdfIn PDF document text
    • http://tottazo.com/userfiles/file/nonezemukejanagijimu.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/zokalolesiwabawareropedim.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/viluzudevibukixoduwim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=vidmate+application+download+2019PDF 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_off0000cda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA4 10924 bytes
SHA-256: b69f952148a0c48d9ab8ddd9c4d0e9a842d35a73ea2f185c2307bea2f659fad3
font_01_sfnt_off0000e701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE701 16492 bytes
SHA-256: 9d120ed3ded11200ae1ec50b6f98500fd51799864fe85098f7ff300e466e12bf
font_02_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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