Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd02edfa006e0dfa…

MALICIOUS

PDF

87.7 KB Created: 2021-08-05 09:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cece4ce07261f6dba16dc067011454d5 SHA-1: db648186de5b40bb9424f191e98237b6f2886c28 SHA-256: dd02edfa006e0dfa3392b28f085e7f195ad4b2b306032a03c7cfc8805ac0765c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs that form a link farm, pointing to compromised WordPress sites and other domains. The ML classifier strongly indicates maliciousness, and the presence of multiple external links suggests an attempt to redirect the user to potentially malicious content or phishing sites. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7890a64c0---wulukunukowazigad.pdf In PDF document text
    • http://mimarathi.live/assets/ckfinder/core/connector/php/uploads/files/31786117907.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/xaverugif.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/v76ntaqcc37erelnt7na4klba3/gasevagu.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/pudanatinub.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/42524184261.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/97287466270.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/44484d44e212198de36d8da39c58058f/81216000087.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/91922818123.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/pp4n3pvs7nfjf3102nqertsp2n/xividimoretoga.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/vinigumowewufapujulel.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608befd6c9b0b---19423577305.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/nerix.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/eojlrrs76lngsu1f59b0hgop16/37330145276.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996ef9dfb68---fovewezisizetopuga.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e528650727---8493794743.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/zovofuleratarareliket.pdfIn PDF document text
    • http://kfbi.ru/content/file/10522094206.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ffe7ce78a---noduxep.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac35c5d146a---bisepewinujapo.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/waroxiponuzo.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/51815532432.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/16681305042.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2e7e17618---lifekedavereja.pdfIn PDF document text
    • https://fultoys.com/userfiles/jasorag.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/4061596181.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=jefferson+county+alabama+jail+logPDF 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_off0000f2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DE 11156 bytes
SHA-256: bd79f91c38be1add44eaa0915b378279830135a9d92470595e5d7aae0641271d
font_01_sfnt_off00010cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF5 16452 bytes
SHA-256: c118fec9eaa847247bdb2de175079f4de4ffee8ad46fbf3de05ea263fb4d3a18
font_02_sfnt_off000137cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1