Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc7312b68eef6c1…

MALICIOUS

PDF

103.7 KB Created: 2021-09-01 06:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 49c8a6b4d45dfd7e8e806857d4b2b7fd SHA-1: 4e421094cc1eae4039b770dd4a23f74e0f162653 SHA-256: 8cc7312b68eef6c11e917cdff27068fa458aafa1281e30e1dae683c5ba191aba
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ce682ec9e828ed13385e041fa8edfb5e/bapivene.pdf In PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/8156990936.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea8476b497---7979780406.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/0f7b3a122ad87d78e80916e3685e8763/resovatogi.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160708d67021a5---sufatojedowepod.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/51402872262.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/30260892480.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b856755af20---4665232328.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16115ed94bcf44---10118546861.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/lifesafonobamusokerofag.pdfIn PDF document text
    • http://usagimatur.com/files/others/85566501704.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf5e3c2a9de---20772816057.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/9n19qbbuknrbmokrls4m0360mk/49137189761.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/use9n3j91e5p7s905kf6s9956b/tubopitobunajiragepigom.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/ropurepopikowifidexo.pdfIn PDF document text
    • https://aeap.com.br/ckfinder/userfiles/files/29656733665.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7243939e83---96866591330.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/aopg3qrjjm51pt37skig0dav48/42235671514.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2965d3c961---71931431219.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/0ebaee6afa5b02796b14fa2373956515/bekowofiz.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161043f99a8fd7---difomimipowoginazopu.pdfIn PDF document text
    • http://araonline.hu/uploads/file/makudafalasanuroziso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+virginian+halfway+back+from+hellPDF 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_off0001290c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001411e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1411E 20888 bytes
SHA-256: 11b9d53594ca52593e62c63e2fd71e338544b9f9a25d042ac6b4fda7409667a9
font_02_sfnt_off00017728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17728 10980 bytes
SHA-256: 4a2f98e28571797c7db3cbecc5358aa94d2a2093d0c6db995ebfd57cd8155829

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