Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3b1021c2afa19c…

MALICIOUS

PDF

91.4 KB Created: 2021-06-29 08:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 670048dc20865810b7676579dcde4c33 SHA-1: 9926d3ed06e142b06602636571e17c1af217f3f9 SHA-256: fc3b1021c2afa19c02db1becfaf4da8234325ff3ea13dbb5250f57ffeedd0441
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://entone.es/wp-content/plugins/super-forms/uploads/php/files/00cac33dd567f7154dcb4f74f34c6d76/tilulexasarezubulutoriton.pdf
    • http://aarogyamedico.com/userfiles/file/67668828707.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4276d7fb93---59825468873.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/28feuuht5jjtiela0veo4eofqq/tumujudujeloforoxu.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a4b1ad57d---44097438861.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098bfd25df0a---50414811026.pdf
    • http://usmleworkout.com/files/file/81582805888.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078990ecef4f---vobevememiresufis.pdf
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/gerenejudu.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c528ff4ccb1---vujenapijopisewasil.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077b241a4466---96206225781.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/8ud7ih1iuo2plbnkf61jsombud/87844652095.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094d9c717d4e---jodajunawariva.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/2cb03ba0c8ffe57a335df1d5462e69e3/wokumipejido.pdf
    • https://prosperitas.be/data/assets/file/22690544983.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/9a03ce50db9a00ad9504159a67fdfebc/rubavusuletidiwaxuxi.pdf
    • http://musorcentrum.hu/files/article/file/saxabijadagorebunuwexalus.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/1113e329862a03edddaaae9abae967da/runonasomi.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160762ce57c286---39998067354.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607277d8a9361---34129902382.pdf
    • http://www.bluewhaleline.com/image/upload/File/favurudazemakedijobatowa.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de5066d02b---vapadazigu.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/d96ce8a6b090e3496f0e986d6901e019/bawobeli.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=wall+street+trapping+101+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffb4.bin
dc246be4e15701e2b55a4c119e763abc5f7962166a2f79f1abf5d8376c3ba2ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB4 18104 bytes
font_01_sfnt_off00012fae.bin
fa75d1226c39b3ebdeba2c065434f2946ab917c3b74540f0313a9e91585c4a79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAE 10720 bytes
font_02_sfnt_off0001483f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1483F 16792 bytes

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