Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a695dc0ed59dca0…

MALICIOUS

PDF

70.4 KB Created: 2021-10-03 00:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1903aaeb3acd728b681d183f4d6115f6 SHA-1: 7018c6a100b17296d3dfdec5f8f8fc8354ab2cbf SHA-256: 9a695dc0ed59dca0e36972410b008357cbb47e0fa6e3a2a9e29d01ffa7d0940a
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs pointing to various domains, indicating it functions as a link farm. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a potential for redirecting users to malicious sites or for SEO spam. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pistant.ru/uplcv?utm_term=thursday+lotto+results+in+ghana PDF link annotation
    • https://777mto.com/contents/files/97602746643.pdfIn PDF document text
    • https://primer-spb.ru/files/files/lidefitetu.pdfIn PDF document text
    • http://4yoga.by/pics/files/2187768750.pdfIn PDF document text
    • https://desco.scp.hr/files/dekigufuxajetakama.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/77467347345.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/gesiwe.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/numusumalabedibizib.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/73325023320.pdfIn PDF document text
    • https://atrax.hr/files/givap.pdfIn PDF document text
    • http://espicycooking.com/files/file///porulimutotoxokola.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/58821370096.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/zenupig.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/68313497472.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/529bd73acd5516ebb799b42b1196815c/panitapukagazawegere.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/ziwitimitigegekoje.pdfIn PDF document text
    • http://weshare.vn/attachment/files/39871498118.pdfIn PDF document text
    • http://khachsandomino.com/hinhanh_fckeditor/file/6373589966.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/49165901662.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615696f24502d---rajodesu.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/delife.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/27607099450.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_off0000b05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05B 10704 bytes
SHA-256: 66887d10c41ab82320447ff80ff906347a5540f4455c8dde31a96721438f0fa5
font_01_sfnt_off0000c8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C3 17124 bytes
SHA-256: cb0a7a69dcc435f71828d9077dba6886e815a579a553fa90ddea26018f6560a0

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