Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1ed9e8ed7bdaf0…

MALICIOUS

PDF

129.3 KB Created: 2021-06-28 10:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6ff12e0abce9444fc852e92bdcd283b3 SHA-1: 75dd34038e1a3f32598e42b10049659229b98b00 SHA-256: cc1ed9e8ed7bdaf07b7c01df536406263b1c2f6cd73647f9bfc44d731bf4a6da
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://cfi-registration.org/buzzboxgift/img/userfiles/files/velameximaluxugepanogowem.pdf In PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607750dd69274---fidagi.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/88239574030.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/wileda.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/72d7bfe5a3aaecaf0a9ee6b3e46d86ae/97755336898.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea1324ff7e---47323059751.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/a90ccc6d5b3d7eba3b7b18bde404b12a/dudak.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/51337636217.pdfIn PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/rexoxivavileweduv.pdfIn PDF document text
    • http://flomojapan.com/upload/files/noxilomodebufimu.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/11688138184.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/59316390839.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab95218148b---84629262667.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/89957071914.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/81413445700.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/c4388a698e1da76a052552c2646a63d4/toziwivaju.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/se731pth5q7p17hefj4f0m521u/80031305908.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/13106765440.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021051814242651733.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160782d1ebd39c---50799997033.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d42a3c55b---gajawefama.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f4c481e07---4799262827.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/ok784vf65ppl4hdpephrbaaniv/61198382739.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/18370873690.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=bahubali+first+day+collection+worldwidePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000180a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000198bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198BD 11068 bytes
SHA-256: d80508723a0b2b53cd8615b76f048809864aec02254f4ea028a95d7844f1cb63
font_02_sfnt_off0001b281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B281 4700 bytes
SHA-256: 8860b0f568d99aa5b2cf123ddffafc39c8116706b235ee0e543d2526fddf9a3a
font_03_sfnt_off0001c3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3E3 19448 bytes
SHA-256: a9317287cbc2db9f86912436863d14dd868d6a14973bfd47c1491eff64bae880

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