Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6ad1fd75f6bee5…

MALICIOUS

PDF

83.6 KB Created: 2021-09-05 06:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ea915e1b6b77a00dd6c5e5659ca39475 SHA-1: 96afdd3d7c9eee5dbad63d87e2b2a62718df2982 SHA-256: 0f6ad1fd75f6bee55fe9bb0f33614276f619e4a6d1abaceb224aedc0d2f2871f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised websites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/662fbd6e921216caa79cb94d435ca7a3/kuzowaxaxed.pdf In PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ded57eea0023fc3824d0de857b38d24d/xifob.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078761e1ff7f---xarogegapeziruxofepu.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/22420597746.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c58a00d54b2b212bc9d62904b83ed82c/45236243094.pdfIn PDF document text
    • https://rpitrade.com/ckfinder/userfiles/files/paxit.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/78739067255.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/totupoxigeka.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16091f6729ed1a---basimidib.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210803_F8B2CC0ED04C9670.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d57b719fab1---rexoruwapoxemurisenov.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/mudagutevevogixug.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/4770158175.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/44d7482c90a35c0ce7443a0ed4e2ee46/18137789546.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/19086697975.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/kemebufuvikovatenojegij.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/f350d9cf939d19a00cdc102a97210d58/6029663691.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca14e9203d---luzekezi.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/1431547212.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/55583793878.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/28218165981.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/13346988542.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/7180175668.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/xolofitimewekikife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=traducteur+automatique+document+pdfPDF 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_off0000dbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD8 20792 bytes
SHA-256: ead49e63889e7743886c7952ac07a66b43ce23b869103a8e4d181b9d1bf14465
font_01_sfnt_off00011051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11051 10776 bytes
SHA-256: ecce2577131a7634e741bef078d6c440e663c5fb83fe6e443072f1590d1f7a36
font_02_sfnt_off000128dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1