Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ddf3ceec0ce273…

MALICIOUS

PDF

82.7 KB Created: 2021-09-09 07:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 41075bffcd8db9d79d7e4a30690be301 SHA-1: cdce792c9834067cada55804527d3b7d0f90940b SHA-256: b9ddf3ceec0ce273fc0b5e23e2bd66e864799660a66cffedee3896580a8239c3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://oniceh.ru/uplcv?utm_term=carx+highway+racing+android+1 PDF link annotation
    • http://ntep2008.com/UserFiles/File/pifesubirurul.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/pamakewejimezufekusotax.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/tiwotusasenolukoxenun.pdfIn PDF document text
    • http://4bx.pl/public/file/zaturoleda.pdfIn PDF document text
    • http://www.culturehousesun.org/photos/file/91169067605.pdfIn PDF document text
    • http://stattus.com/assets/file/3513520530.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/18164416619.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/tekenevegiropaje.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/47152293325.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/6f7476a5ee0bc18e0bdcd66f34080a31/45174235841.pdfIn PDF document text
    • https://allianztc.ro/files/file/5723731949.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/reluziburi.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/dibeburadibu.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/kovatelijaf.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/39135000664.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/30316278129.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/42240571169.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/kunodadixokave.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/79582054296.pdfIn PDF document text
    • http://bibikid.ru/upload/16687729234.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee55a570ab---sajataze.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/47608929017.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/zababejubedu.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/buxuginepidupiroduzamaxim.pdfIn PDF document text
    • http://forti.in/userfiles/file/521134717.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/podozuwaxomizux.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_off0000e024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF836 16972 bytes
SHA-256: 532c9abc5ae090983249acd760f0a16733e3e74e7e2275a4ee50a216e72eae56
font_02_sfnt_off0001248a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248A 10592 bytes
SHA-256: a94c8e47922e84152b4d357f0507a86a528025e400ee43654a7159249888cc64

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