Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda25114972023d0…

MALICIOUS

PDF

106.0 KB Created: 2021-08-03 15:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bbc6e834edc5977f5d3221b131004d06 SHA-1: 282b888988819b3f9828ef59a4c58cadba24d45e SHA-256: fda25114972023d05b7688b05119f5151957beda1a7ec8981085a628c9d4aa78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure and URL analysis point to a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://3mfa.com/images/editor/files/20156538451.pdf In PDF document text
    • http://orem.mn/uploads/files/sabevurabo.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160982e41f39c9---mifimolusonagugovus.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608de819bc854---60245286423.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/84ae93d0398d175d7b66e11620a6d2c2/36911764418.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/25367723545.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607dff3f97975---52154490182.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/66627707599.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/dosurigewejoruloliv.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/21253526238.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb34018ff5---98167540772.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/42943472667.pdfIn PDF document text
    • https://12shio1.com/contents//files/18153797684.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16078175329fe6---pobikavavonekatusazureko.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-6-4/20210604184857291119.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/8b33938439147fda44ff1e795a7aa669/72869571590.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02baa0bd66---21672914161.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/32b3a241b564c6f9fbbaa39c3388ac4e/50739575633.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/xafiwowavuwewakanaruvuwi.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/857663460470f5d4a33707af00a1a0b7/bapikapuxejejefug.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d601c4be31---76215218585.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/jopug6qkbkpks24gl1un1u75ij/muwowir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=employee+training+matrix+template+excel+free+downloadPDF 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_off000137ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137EE 11080 bytes
SHA-256: 95a0960a03b98da6dde386de27195dcdc8a9e4d0e44cc7ab33ece13283c95961
font_01_sfnt_off00015192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15192 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000169a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A4 18048 bytes
SHA-256: 6a31ba2e4912f3b0697669e7bcba82ad888ef0ae06007e1ec7b796179b1387aa

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