Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45d98cdffe55f4d…

MALICIOUS

PDF

90.8 KB Created: 2021-07-16 08:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eb4fc50e9abdf695bb317680c8c282af SHA-1: f31721e643cdb85c39cee85fdba94507b6a32108 SHA-256: e45d98cdffe55f4d737cb6db4d19cd6a7d7860436025c9f22f0a2c48675f0b90
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or credential harvesting attempt. The critical heuristic 'SE_SECRET_RECOVERY_LURE' strongly indicates the document's intent is to trick users into revealing sensitive recovery information. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krisoc.ru/uplcv?utm_term=amy+meyerson+the+imperfects PDF link annotation
    • https://directorvincentchow.com/fck_filemanager_upload/file/xugedovijuganotaneluvon.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c1bcc9216---69905834631.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/24958959294.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/mixabi.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/363ec8cfdf9536a9218f931c9f737e7c/werigalipiwelasinagolezum.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16083440584c7a---27838337572.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/jhuakav7sucrimtv5p3leq4u11/tojenabogol.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/93673181646.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/wodudog.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e5daa88a6---ruvojotikuseluredilezagud.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/mixirusexixewavalob.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/vesavawenireluzu.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/zaladadabofuza.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/a89kr88oimi4reem3k4q6m9t4p/5035970979.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfef0821d5d---7405595923.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/050f524cc494cd4c8d53995b2a34e6b1/lagetelivuwimixadidub.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/zatulekelukosir.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/vebijowarasaxitoz.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/3aeb5633572d3aa31dfe12ba9b739e42/19440936713.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/karukipewetaxosivelaso.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89e1e12653---kajejakuruwut.pdfIn PDF document text
    • http://scro.ru/pic/file/kuxetufimu.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607215ad5d071---milarenedaroxuviwapura.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/jowasikaximobixida.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0449aadcb4---75886544231.pdfIn PDF document text
    • http://phs1961.com/clients/2/29/29da8dc1278d8f1c58a3d16208bcb4e7/File/48995502336.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_off0000ffdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 17024 bytes
SHA-256: 41b51b7f6f410a981937d66b9cffcad7176a514b07640b7f149091643ce7a2cf
font_01_sfnt_off00012c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14443 10632 bytes
SHA-256: b199bffa351a9367675d01d1ebf03f4fa531f6de947a3f227c9b9c2dc9b1addf

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