Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5030cfb5bc2eb8…

MALICIOUS

PDF

105.6 KB Created: 2021-07-21 03:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 113aa3d738804a9a144cb45bb5a4f0ed SHA-1: 0e47f79fc082d8bf3520c8f5af938b62e45e6eeb SHA-256: ba5030cfb5bc2eb8d570ec871df1df272ac0cd6eae607243c658291c4168d32d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm or redirection scheme. The ML classifier strongly suggests malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608270238102f---60259774941.pdf In PDF document text
    • http://sibmetiz.ru/upload_picture/97332095323.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/puxijodosowadanikeliboba.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f53f29bc9f---31651211100.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3910336c6b---59006099180.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b740325f62c---jesivorabepinakanunik.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/7d9d3515475dde2558e643bb80d572c9/67250023151.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/mugixodujuji.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/8hunmu6bvnmkpg5jmk0cuvni2b/kejikutapabepuf.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/xefom.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/24772896722.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5bed247e0---7634325714.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ada9b0545f4---mutezibonun.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/lufim.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/10634794946.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///81712344244.pdfIn PDF document text
    • http://stroi-sistema.ru/img/jotiziwobozixedi.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160764339a51cf---wagalutojunisujomodowi.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607920a6b9d45---16663203497.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/nokuvazabujosavuze.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/plk1pnec9ug4d73mnhjifrktua/vamexo.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a701fe6021ef0f360a55e1152c2a1854/kalubelivisu.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/dfd4223cc2aa094d38b4356fc5895957/9710159240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=great+pyrenees+puppies+for+adoptionPDF 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_off000139d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D9 17396 bytes
SHA-256: f635e0ba5a59621190e8609b57409938923cacf4f6224fb2e93d89d2613ac5e0
font_01_sfnt_off0001668a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1668A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EA1 10700 bytes
SHA-256: d95d32c41fdb8947b179e21b52f50a9e227a99ccdbd00a1ae830e40efe1f59cc

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