Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c29f36f74e99b7c…

MALICIOUS

PDF

70.7 KB Created: 2021-09-12 15:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b912f9f6e7ce3b9771470a7e18b570a9 SHA-1: bc075a770f628fd63e1e9cd9c43dd31b96ed479d SHA-256: 1c29f36f74e99b7cc4b64c758769c21b555a4db5a854b2da8b2895f8cb3d1887
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous external URLs, with one heuristic specifically flagging it as a link farm on disposable hosting, suggesting a distribution or phishing attempt. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of many links indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6634

Heuristics 4

  • 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
  • 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://drafthe.ru/uplcv?utm_term=how+get+flash+player+on+android PDF link annotation
    • http://ccsl.asia/files/76849884759.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210910_B44068B18BC9BD98.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/48129882753.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388e4eedb12---53315199860.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/83705373320.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/20302716576.pdfIn PDF document text
    • http://tsmsaldature.it/userfiles/files/50427660459.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/27316845971.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/43078419847.pdfIn PDF document text
    • https://fivetc.vn/uploads/files/2418119498.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/sixegavilebezigudo.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/52917402661.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/22723324214.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/zezevezeziriwosikenema.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/67067403332.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/69932782763.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/dexodizife.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/64553584872.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/39974273544.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/kuwelinawewukekoje.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///38071503366.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/revivakexezawumisowimot.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/koralureser.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 10968 bytes
SHA-256: a23cf91d356fd365d995862eaecb079bf572c4de24f5eba53ac98e00b7bb0a99

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