Malicious PDF — malware analysis report

Static analysis result for SHA-256 302eade00e70a3b7…

MALICIOUS

PDF

415.0 KB Created: 2021-06-26 22:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d3ad3e9361108107d7c140a0c71af227 SHA-1: 709db1d6b55b559059d8afc823fa382ea89b8382 SHA-256: 302eade00e70a3b7f1c4ea54a2c0ae0f992d289a5b089543230c67b390dbcb75
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF that contains numerous links pointing to compromised WordPress sites, specifically targeting upload directories. The ML classifier also flagged this PDF as malicious. The presence of these links suggests an attempt to host malicious content or redirect users to phishing pages, likely distributed via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8501

Heuristics 4

  • 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.
  • 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://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b26ae16fac2---14351997728.pdf In PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/f5402df674f8c9c4ee602a825e09d652/jidinarigemafijupavu.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/78305442387.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/9n3effo04gp0uq4keehls4lh70/dulamumuzaxana.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021052902484873499.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24b2dc680d---93120091110.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50726085f5---xakadixaketakorapod.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad14d30387---jifigawewakolepanobaj.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/29d11e124c5b12d106f3f2e015d9e4ee/giluro.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160829d7962445---49755101235.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/jemurokoxivimekomevup.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/3dda773e1f582b786a3f500285c458db/revivigipatudavodep.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/56531824711.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d676bce845---xugodugasugazeted.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7271b685ff---90723524232.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097e231836ac---pemusivasufawedalezi.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091c7d63e025---72357906402.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/010cc82780fb872a15ef5fd55c96a4fa/putizolakatitupajari.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/3c06d188b5233c2501424f67822de879/pijijunesinezatuzit.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fe2e727ec---jepekakafagonop.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/karogixapunovef.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/mavowopivaxosumatisokega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=section+3+mental+capacity+actPDF 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_off00060d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D88 17920 bytes
SHA-256: 16cd2948223402a09d99e996f712d5f361691296f781f70f9ef3f50560a72736
font_01_sfnt_off00063c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0006549a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6549A 10628 bytes
SHA-256: dff44f8d695c18e8bb2af412f471fe3d4baa6ff6536df6d65cc2aa61eceb64d8