Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dbda89c2ca3404…

MALICIOUS

PDF

70.9 KB Created: 2021-09-18 03:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5ca071846202d6c9f2594fce90105439 SHA-1: 65e36fd1954e9b9ad00c1c350835cf3838fe03ec SHA-256: 08dbda89c2ca340476d5fa9da8a5fed99e5af85fd91a5a3f3108852d9def84a3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of links pointing to various domains, many of which are likely disposable, indicating a link farm designed to obscure the ultimate destination. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and numerous embedded URLs suggest an attempt to redirect the user to malicious content, likely a further stage of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/161413f86ab0e4---rogegiximu.pdf In PDF document text
    • http://hocikto.info/userfiles/file/dikitaruwuzimilasitiw.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/kakurujovetofaxe.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/60126988558.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/88022862437.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/xaralon.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16144c00c0ae5f---ditepajamukemoniradazewe.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/luliloxip.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/69772868098.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/javow.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/55338436832.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/33619591656.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/57172204161.pdfIn PDF document text
    • http://daydeothe.vn/rich_editor/file/64966538785.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/72253593704.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/saruvusedowevefediv.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/wekawunuvokakipimena.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/gemalelifufidix.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/favekutuwewaw.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/12392260676.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/77355705520.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/40522937252.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/9127326519.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=android+studio+applicationidPDF 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_off0000b535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB535 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4C 10456 bytes
SHA-256: e881c8685ad35989fafeb81eef6ace0a89695dccdfdf89682eff32552d818cea
font_02_sfnt_off0000e527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 15980 bytes
SHA-256: 5000daa12cf06f8abdd46441c89c4e7eaeeb7db19ef933f8561b84aae53202f9

Open this report in the interactive analyzer, or submit your own file for analysis.