Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0238cf629a5f388…

MALICIOUS

PDF

80.1 KB Created: 2021-09-01 11:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bd1dd500210f190d382ca41fdf8a1884 SHA-1: c028f3b79179ee623a7b4f5ac32c61a667251df7 SHA-256: b0238cf629a5f388e6bc06fe5a1acd98369da3fda51b099ce272decf6b36be62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload directories and other suspicious domains. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or scam campaign leveraging these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://oniceh.ru/uplcv?utm_term=rise+of+the+villains PDF link annotation
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/043ace146fa97df05c10c07f791e1477/mopekegamimikogufipux.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d98753deaa---mofenajobevavubevoxexi.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/jasunaximujijug.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf6a0b2c9---rubure.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160881738e5d90---lofenefim.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/bexasolewevilakopufoxiga.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21fc0a3e36---zakasozikigovibo.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/88823357284.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/gojifidajulivafaj.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac66c0126e4---litisurujorozoliranev.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/lunipez.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/9e048c49f0d087350b15b4cc5d61cc73/fawulogovukepubikateto.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/pilozurefememunevewiv.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/wurovabejivotebujafeboxe.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/ropov.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/7666981716.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/89208498315.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/luxavugasatumemimi.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/620a5467c8e1b0aba8dafab9b72129f2/76294557360.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44b3e8d2a8---47365175239.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ute78fgcdik4vcub40ddl7httm/vogimipomisof.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ec533ab35cd---xikerilodugavutix.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_off0000d8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 10324 bytes
SHA-256: 00bfbf99de779bb60f9bfe4b24f1e76435b787d7dff57e7b1d3395f371dd57f9
font_01_sfnt_off0000f036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 16724 bytes
SHA-256: 45e5c76b8c4b3fcd9edad8bb7e70dd3403c0f44169f0cd8ca071905f4a7f10d3

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