Malicious PDF — malware analysis report

Static analysis result for SHA-256 0344d69474ea3855…

MALICIOUS

PDF

201.7 KB Created: 2021-08-16 20:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 73d621ae3d1f559429191e4ccba54500 SHA-1: 98dfb5201da6cac2b0ac1ea5e614667dcbd5cbcf SHA-256: 0344d69474ea3855f159e9bf6194f099793d75603c2b2f53e47a8d0b2ce74660
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with at least one pointing to a compromised WordPress upload directory, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the presence of embedded links and the nature of the heuristics point towards an attack pattern involving redirection to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a85756dd8---kotolunoluvin.pdf In PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16098d59a00ff8---8354594776.pdfIn PDF document text
    • http://flyingcarpetclementines.com/userfiles/files/topiva.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce9e5cb3b35---bevagupove.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/pumamanatasupunek.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dc3f1d14f---porosom.pdfIn PDF document text
    • http://bfo-walkforhope.com/clients/e/eb/ebd0efab9cd97e953e90891d9eec7aad/File/82222116832.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160994c06bab90---lorikegezuzowala.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210803154212_1712124784.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/gginjehft98n71km3pa8e0m147/gifera.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/21353356893.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/kapewuvupupixadasi.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607009229dcaf---48785487524.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/b8621668f6fbf64c43280847fe9284c3/23421997988.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/gb7bo328fu9p4ljia3jbe7pfkt/51285988508.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/56ac1a047e9a72b39611fe2ce941d7b9/votewobawijopetipif.pdfIn PDF document text
    • https://lecapsuledigian.it/file/80357138521.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/naborobepofudejuxalowas.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/18381582708.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/d2cuusmrhf36qdhrn6nfap4pb0/82794325840.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/13009250084.pdfIn PDF document text
    • http://nenanhduong.vn/Upload/files/48285509533.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1491a7bf22---71442184334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=weight+lifting+schedule+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7B0 10612 bytes
SHA-256: cf1c518eb79391a742df615b14005d325d18592ab4d28218a705f8985b5998b0
font_01_sfnt_off0002cfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFA5 17992 bytes
SHA-256: aaf211fd1648ef20298ad7a737c1da04b4b6a9a366fca0b1236d514d2c18a377
font_02_sfnt_off0002ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1