Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de45b0c81f225a2…

MALICIOUS

PDF

88.8 KB Created: 2021-09-05 04:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 481b6a9f6b2fcdf2f70d15c336486a3e SHA-1: 54571264e580629af34e700e23dd28415ed768f5 SHA-256: 5de45b0c81f225a291bd691321975b3c94130de9159df04f35252b38167f1a50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a link farm pointing to multiple compromised websites, including WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a broad distribution effort, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/69c297abd612c42372ec3e45c9629e12/zenuxa.pdf In PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160722bf10845d---59855146058.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/47908712699.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/39369040931.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/botozegekaruwopuvagi.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/segubosutemibowifinu.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/nojako.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/13085112881.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/67215096925.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d02d2db452d---14006948225.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/setos.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f2bfe45d4---bixovazesomas.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/67307595280.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/gemudijogunuwi.pdfIn PDF document text
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/52040118634.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/5c0f5e7a933a457f519609d4146d39ca/10093966070.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d9cbcd8b6c1---32512423622.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/wusuvijigulonutimufa.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607366b2cd4e5---15502551232.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/56147900361.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/4630664938.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/kowopivazezizab.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7c61a244---zowosubobeda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=french+revolution+documentary+worksheet+answersPDF 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_off0000f50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 18056 bytes
SHA-256: 1690a20d44b9868bfce33aed91cf839f6fd5a50bc901792ed2e4959bb9958c22
font_01_sfnt_off0001238c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238C 11068 bytes
SHA-256: 432e710d8fdb711838b7cd3bd798abd5160b8440f363c1636c5a6da1b832034f
font_02_sfnt_off00013d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.