Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a75bf18ee4341e0…

MALICIOUS

PDF

56.7 KB Created: 2021-06-21 00:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 22f1f667519b93ca1289baf5ae284c9a SHA-1: e854bf46485a7937f4646fdad9e42bea579d9273 SHA-256: 4a75bf18ee4341e0003c3a7c227f917b779360001ccf35b62a61fd4bdcfd54a5
154 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 pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://crysiq.ru/uplcv?utm_term=osho+tao+upanishad+pdf PDF link annotation
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f2d4a837cbaabf12034949fa82c37979/27346619460.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210529081009.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/85877969203.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/tonofubewo.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/1682846279.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6afb11d36---galajix.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c0f2454022c30001ac38f3cf06f91822/31251933077.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/3tmlbbpj3jh04i4nl20vhbdti3/fiwopimobij.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/4b54be2e86db33200d6109fb7b62e168/23452041246.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8f2ae2b68---34976445097.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160814e9d2bb9f---gupagazagezosize.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e459b248eb58af5b6fc65a336ab0d40/beramikodip.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979f44a91db---40832771635.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf23b9035b0---14874476449.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/db87c59e666775d6c0fb61c69e448d65/sexamovaso.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/sadizedikakowupomilejula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C9 5028 bytes
SHA-256: ae6137dc3b9ed45f79698fdde435e4242a7b89b94e57a8ff26f62d3bf2541de0

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