Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eccaf9ce6e76054…

MALICIOUS

PDF

80.8 KB Created: 2021-09-17 20:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 27f4d0fbe4f2fe30e6afac5a37c9dfca SHA-1: b9217c0358bc6b80ecc4537e03108b89f74d940a SHA-256: 7eccaf9ce6e76054407837a1b65bd6f19647e231547a6880c5f649c7dfd52baa
86 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ML classifiers as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous distinct links, suggesting an attempt to obscure the true malicious destination or to maximize reach. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ventadeterrenosagricolas.com/userfiles/file/ximidataxapipodizudod.pdf In PDF document text
    • https://kaemsp.org/upload/editor/file/4870884183.pdfIn PDF document text
    • https://mmtours.si/uploads/4105956053.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371e50b4c17---tewul.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/soragakegika.pdfIn PDF document text
    • http://araulmor.tel-cor.com/images/library/file/xejediropowotug.pdfIn PDF document text
    • http://hillcrestneighborhoods.com/userimages/30674230740.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/5734557094.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/bixanakosuxekefas.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/pinitesatabejenuku.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/fidunuj.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/62784705118.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/46301675411.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/736739239.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/8995464510.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/wimawizuz.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/tonakowexevalamanedij.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/jopedazopabavurutatajo.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/taxugumumukixaxet.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/83724454043.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/wekinedip.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/nepanoxamikoturo.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/togejujolez.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/38686513469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=wrc+apk+free+downloadPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/josusisowerejiniri.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_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 18580 bytes
SHA-256: 4b9c253d50c1402618f6927904356fa1196d0a0266e913acffaa0a7ce35dfe86
font_02_sfnt_off00011dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD9 10424 bytes
SHA-256: 3592f2858ba5313610fd43dbe59b5f625ee778e31973f54780b40c77f1da2b17