Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd72ed9ddb046c7…

MALICIOUS

PDF

74.4 KB Created: 2021-09-02 02:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 40f8f3bf71fb66114194739a3d2fc75a SHA-1: f873300d417208f46b9edb8018e02dfce0635e12 SHA-256: ffd72ed9ddb046c7b0d0846e7a94bffdecdfe14a428bcbababa0e8c308e65315
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16098d8f39b4c0---85427834471.pdf In PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/37125312381.pdfIn PDF document text
    • http://easttbirds88.com/clients/d/d7/d767393c090093bf18db16876c07b5c3/File/36712806015.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a6q378or319qql53oh9034gtn1/18309635112.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/berakatofogefutuzudogin.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/patidutajukogituseba.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6f3033877---74186379170.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/tufinoturebabil.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/75554519862.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/58980016701.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/f3cc5ac4f109ede1b2711a7c14b2f72b/11276779357.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16100d4d75ac0f---6037569112.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096cf20d909c---44089081160.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5bc7dfee6d24cdc437d47893a72a8031/92181043716.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/tofepo.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077a62629bae---fawijupama.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/toxediso.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/vavunasekebegawadaresoz.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/palabilebisil.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/tujixuz.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/gudafimufowar.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7c94373f4---ladoberorututime.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92580a815---tixukok.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/13ja8q5pdp4n1t1dhodlfhhrv3/labepib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=good+lesson+plan+templatePDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ca702a1abc142e4435a19ace59acf692/fumizowod.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_off0000bf8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8D 10400 bytes
SHA-256: 721322d7472a7e46c3b1f03ddef5b0cbeb44ad1f53eff20e8cbf7ad28ae2856a
font_01_sfnt_off0000d71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71E 17264 bytes
SHA-256: 12d9f673bb5b1582f62a5b94c4f4d52767b8554daa06544a5cdc393fd926db6c
font_02_sfnt_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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