Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f307c455107eef6…

MALICIOUS

PDF

69.3 KB Created: 2021-08-06 06:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 284b31b768702deaead3d42a97c2170c SHA-1: 71de750475f5a431fbd3e5a15f12b0b26e7b37d4 SHA-256: 8f307c455107eef6050833eb54dbe3587804db506c0b6bb64805df900f87245e
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating it functions as a link farm. Heuristics suggest it's a phishing or malware distribution lure, with ClamAV specifically identifying it as 'Pdf.Phishing.Trojan'. The embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6691

Heuristics 5

  • 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
  • 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://coretry.ru/uplcv?utm_term=free+black+gospel+sheet+music+for+piano+pdf PDF link annotation
    • http://sy-smile.com/upload/files/85934772857.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/92c9eeeb1ebf1d05583899f3c77d3ea2/rulatizebafofe.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/bavesuf.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/47741476099.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0e2129545---95662783618.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/848a7b14978cfcb30a1d8ab47c71ae4c/93575883952.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/2818636530.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/69900936860.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16088cd9e2816c---86223497240.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/24647109371.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/d9c179e02a0d89a4a8b2ff69e920e1dc/69787984547.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/fetaxitekamesegik.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/50723057194.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/78463241522.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/3269e4fab411e8350c54a30d1ecc73f1/rofulonewudupitozikokilal.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/36033429825.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/80467237699.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a23f551acfb---repovugoxiwatovi.pdfIn PDF document text
    • http://tnetimes.kr/upload/file///4809971534.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/60953280791.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/54222606105.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a3fd08b3cf8e79a4ab8e4f70f304693/23082391246.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/cb92ecb2826ba11cd5ee415452712331/12084382779.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 16904 bytes
SHA-256: 9d2397775c1a3d9f965e29105acc126932b03c94f48cd2f175d0e86d9909e522

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