Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbecb10e0607682c…

MALICIOUS

PDF

80.0 KB Created: 2021-07-31 06:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1d0330096a6f2cd9e8dde4182f955cc7 SHA-1: 295e97ee91eb87560992f739919bf0ac734452d6 SHA-256: fbecb10e0607682c5522edf20a0360effa0f80283fba1058d0d7bf984f9f0141
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by a high number of external URIs pointing to compromised CMS upload storage and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or further malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing and malware distribution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9244

Heuristics 5

  • 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
  • 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://pixomot.ru/uplcv?utm_term=descargar+corel+draw+x6+portable+en+espa%C3%B1ol+gratis+1+link+mega PDF link annotation
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160daa104252b1---90789432202.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-2/20210502131542337419.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/pexogodujotusikiluwulo.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/16533031049.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/4243370229.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089618ff29ab---27857288615.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/996fme2bo0394b83e2b5dk3il4/tilavoxasewomovejo.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14d824260---vujewifotuzevimuzuzojan.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b108e05a38---nanara.pdfIn PDF document text
    • https://activepymes.com/pub/file/36706857354.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61839346801.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-7-30/20210730031309280818.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/62172371850.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3a996b0f9---maruxelotowovuwem.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/41379344793.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ua0veh5qtb4ot5tpdiir8385e4/bozamiva.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/72318842880.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dfb6294f2---86986553692.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/butarulowexakasodezuda.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/8o17sqctchbj6s36rtdvp9t1n4/11878559401.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6824f7d9d8.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EE 11704 bytes
SHA-256: f6cf1331fe5342e28d21d707513ee4adc0a4b9510bc29ccd1dda330c39a625df
font_01_sfnt_off0000ff4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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