Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bcd814b05d4fa2…

MALICIOUS

PDF

79.3 KB Created: 2021-10-08 19:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 82658336a35b15378ee22cbecbc38037 SHA-1: 329363dba3c435b1c7929ef70e4edd364165d3c1 SHA-256: c3bcd814b05d4fa229fa5e541245ea705691f6149e7d067bc8631247da6ef63c
154 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be redirecting users to malicious content or facilitating SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8130

Heuristics 5

  • 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
  • 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://drafthe.ru/uplcv?utm_term=country+capital+and+currency+in+english PDF link annotation
    • http://yepuco.com/uploads/files/xodigasugetolesuvojeve.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133d95085ecb---59628867256.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/77cd7d6a591a7a978da7a6e538fe523e/zarujibel.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/49178445085.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/mubokabesizejukog.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/kewimalojere.pdfIn PDF document text
    • http://rayer.cn/d/files/kofosobiravaz.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/36024324923.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/lomulonobiguj.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/7119402957.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16148d25b87bc7---wobokisosewajazotokevi.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/26164735096.pdfIn PDF document text
    • http://leguido.net/files/38655375957.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130fef1d87eb---legag.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/zonapatalebo.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134bd4b24005---23730004770.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/kemawarar.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/33683606773.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/1293f7f1b389ff73fd45373b89addf50/53127942135.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc82a99713---mezuvemulabi.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/venixuliwosejipogibut.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/kigoredegadafanavu.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/83064008511.pdfIn 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_off0000dd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 18728 bytes
SHA-256: 2ed6c5f7371951ea3c401bbd580174c37b8994f2405f907fe3afabaf4b57f254
font_02_sfnt_off000124be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BE 11036 bytes
SHA-256: cd3d9b630086e9e1c63d55d3e9ad13cf93aa01b29a38fb843466531f9cd1f956

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