Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee9e17c8cea9806…

MALICIOUS

PDF

72.4 KB Created: 2021-08-28 06:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 582bf44555a26e931aaadacd697c6699 SHA-1: 30f7f717d5288fc0dbccb2db8aed715a2d7a86db SHA-256: 8ee9e17c8cea980690bf218163633f2cb05a7b905ac471ac29edc20a7fb9dc8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites, designed to redirect users to potentially malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://isleo.com/i_photos/file/75646669387.pdf In PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0549b5966---nazudapugazotivujotux.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e7938f5ca8e---bawodomafaguwifij.pdfIn PDF document text
    • http://trhs64.com/clients/c/cf/cfad56e582d93fa9eda51f2516e23bdb/File/bikuretepadoxowo.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/nutulazotinamepe.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/11118281773.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fofemupejixejuwiluzitif.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ac5332945e9---97957540203.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/voravofeb.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/senekezojolulopukizorem.pdfIn PDF document text
    • http://rc-modeller.se/images/file///mixabuxeroval.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/v1s3gf68ggv90gdeur04ljok3d/81416897010.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/mividaredasigitud.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/titefalofodovi.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/81029391091.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/975da6030557e62579fe4eccc81c799f/relizezadalukuj.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b648e815c9e---pozofirekiwideloxowufu.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/18770253231.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/romaw.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/gekisixutupanunomiz.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/32269311189.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fa5b818ad---vorexerememeto.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160898a143e184---21086765293.pdfIn PDF document text
    • http://korytnica.net/data/files/9807025939.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/2938efb3d666c687b210d69b3e40b2f1/98593746775.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=north+hollywood+movie+free+onlinePDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/jeputavoxeluxinariv.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_off0000bab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB9 10532 bytes
SHA-256: a4cef2d61dd012a350994fa18a26a35a4f425eb1f931aa98a0d99646bf1963b4
font_01_sfnt_off0000d288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD288 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 16000 bytes
SHA-256: 4daa8419289f5763628a03e9048aba2a55490ccace9edb2d3904f212b0df4b5e

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