Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdad5a7920fa90f0…

MALICIOUS

PDF

85.1 KB Created: 2021-07-15 20:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b2d801253598ad5a4eeadf8f72743a79 SHA-1: d3772535e2b2b0c7b7a06b64700d9ed7efe858df SHA-256: bdad5a7920fa90f09828b3e41eef1f50c055f5e9aafa803a68749c026b3dea36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the PDF structure itself are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://argol-editions.fr/userfiles/file/rawuzeta.pdf In PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/48568c70f0279637b81b4576658b874b/jinenuxevatogofexunemeta.pdfIn PDF document text
    • http://navigator-33.ru/media/file/girexikutit.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/budik.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/bm0pghsl6mkoq7ierlckvf5kfp/musozugizuwo.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/40607531516.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e44f33f8d9---33762287796.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/sadisazimepow.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/16141468137.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/29403243674.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/27461233378.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/36901766545.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/gadajaretupudibitiboloses.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096c42d5321f---89159631129.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/138e041b2b89162430a00e6eb4950aad/liwamavaranutinuxup.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5945f39f86---53333310313.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/34041577603.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/6586cfc8311e3721996c2b616238ea3e/valunazasivetewo.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/87762700264.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/2226683039.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/41423a8a2afada5092907a83bfca16ef/90732196337.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/2372802376.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=different+hormones+in+the+endocrine+systemPDF 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_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001028b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028B 10648 bytes
SHA-256: 5eea3e07ac5673c718fb53a81876c4a407b7ea552f17772a8e812c6dcedf9e52
font_02_sfnt_off00011abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABE 16428 bytes
SHA-256: 572ad99e1192d13ca1ca57c21169a96298ea42b699b8f52581c3141b84a5d9e9

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