Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ea1db474e7700a…

MALICIOUS

PDF

68.3 KB Created: 2021-10-01 08:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 001932a00853270f70d9e449a4c35aa5 SHA-1: fa2d4455614062851d20683ecf6b95bfacd34a67 SHA-256: 47ea1db474e7700a49ab023e4aed2ad731381551b8c3739e731598fbf53b88f5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, indicating it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags it as a non-clustered link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://chcial.ru/uplcv?utm_term=codes+for+collectrobux+2021 PDF link annotation
    • http://primaria-ciocirlia.ro/media/file/dodokamovekopisigigemisem.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/79874555172.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/11899686272.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/9842804649.pdfIn PDF document text
    • http://catwalkexotique.com/userfiles/62617249182.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/vawitesuramitu.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/39542146249.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/kiterajejopolubu.pdfIn PDF document text
    • https://webdatedepot.com/userfiles/file/3841058123.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/bilepugavuzuranakoverilor.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/99397024226.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/dosoniriludugetu.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/58911148498.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/27866856567.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/54035779913.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/47588747318.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210920092738393.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/474042830.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614e939c497a4---86880608886.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/83487837514.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/52815009740.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/9585683665.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_off0000ad71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC583 14756 bytes
SHA-256: 222f2b682fc3af3e2cfe7d6ed45534749cfac078f8c918ba5492bbdd8042886a
font_02_sfnt_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 10780 bytes
SHA-256: 37070a04e9b8a4c97439c150a54d31e8aa7e33b8036cd4cf3dc48669375da76b

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