Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3fe3694c7b248d…

MALICIOUS

PDF

91.3 KB Created: 2021-06-30 04:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 41e4e7f6df94d0cb6cd7a24667556314 SHA-1: 3c222db1a19ae4b0e2a1b40221879cbac75521b5 SHA-256: ed3fe3694c7b248d9fa5b021cdd02f4c6bd5aa370aa29a3388a9150c6e5d799a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a phishing or malware distribution campaign. The primary purpose seems to be directing users to external URLs for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=the+principle+of+federalism PDF link annotation
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/d0fc1e63d35781946c21f38a8c267cdc/17780540043.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/30902831749.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160701c4b1b0cc---40370013704.pdfIn PDF document text
    • http://tara77.com/clients/46590/File/toketudotakevape.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/9f9eac6239e1a3a858a3e595cb5778cd/vazasutiketidi.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94cbce2e96---zemolobojitajebajux.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16090f7fc07369---1161809581.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/82404144663.pdfIn PDF document text
    • http://klpa.net/userData/board/file/75433224882.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/zulopinuna.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/26189729945.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcb4c9878f---zevefin.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/43102241436.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/foq4rb51rn5vmppnjtjoog7gs0/20473492192.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/hhqvfstgv23rrof3digfg4ku00/99099850923.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/27330066253.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce98dce255---34886112595.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/fq5re22k088ol4cd91b5ujn0i3/xegudadukotawixetem.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/qlnob524uja7fi2gf2bsuvv3ok/92470452406.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/83244784272.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/8pot9jd5uhcoegr5du6blcocj5/90228659927.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/62344891992.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/kaxej.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e5a29e21e---tijudoforadorajujore.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_off00010299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 17300 bytes
SHA-256: 409cfc23b7764bb263f98012793dd48700581b0ce0d7907d5337757c1411e370
font_02_sfnt_off000147bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147BF 10748 bytes
SHA-256: 732b0de8da5adb2bd5e79cd701883482ea5e357769d0a53ddde9c40580fb1c60

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