Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f5100f02519ed8…

MALICIOUS

PDF

93.6 KB Created: 2021-07-21 22:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 03b24505063faca1af060cd7a99231c7 SHA-1: ee16dc02ea8c85128be233bc4a3b3e45b23c3d0c SHA-256: d0f5100f02519ed8c4dcddf051f443f72e663ac995cc3e651dce505607844372
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, directing users to numerous external URLs. Several of these URLs point to compromised WordPress upload directories, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://ajitcoatings.com/uploads/97598007813.pdf In PDF document text
    • https://mecaniquekd.ca/upload/file/94001946479.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4c43ec3ef---72607655221.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822af92feee---36062671361.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/2v7l12cudoh062gvrgs4k7cvd3/wofojetivetamabefuridatus.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/74883930758.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/72795137781.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/85687222740.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080074e0461f---deguxejix.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac901f2db45---42989513178.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/c15b34b2bbcf416ccc0b136368a09f13/69961652030.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/657d2953746a95a699a398d291f1ed96/23870701310.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/41813048833.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/36246294576.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/cihrq9f7j0bn5035lbp9k88442/vuxinisonofi.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160afc2aad3b05---bipabarabuxe.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607ce4d3c84a8---nojixelefuxevov.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/76114343106.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/mafikukowoxelugafovitibu.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a65df630b8---62281961091.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd4670e82a---zuvomirepofapoxa.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160c887dce7b6a---wugavuziva.pdfIn PDF document text
    • http://accronline.com/userfiles/file/juroled.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9b58cd83---todofijebofasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=heavy+cough+in+chestPDF 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_off00010b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12336 16956 bytes
SHA-256: 57a683f8af906d1add82da59e265faf734f88d6940ea32889f2e08bf02a9b784
font_02_sfnt_off00014f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F57 10636 bytes
SHA-256: 491b8aaeb7048a5d70468d08c4ed558fade35dd73bf2c7a1e37be7be06c58e43