Malicious PDF — malware analysis report

Static analysis result for SHA-256 476bfbfb965b3d5c…

MALICIOUS

PDF

61.2 KB Created: 2021-09-08 11:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b24a41bcf988580d5fe17afd12c8ed73 SHA-1: 0f38188716c93b07d926cde8e32bfbad9cae7a6d SHA-256: 476bfbfb965b3d5cde0649b89c875f63b534d9420da1456b7bed0fbe988b244d
94 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 disposable domains, suggesting it's designed to redirect users to malicious content. The ML classifier also flagged this PDF as malicious. The presence of multiple external URIs and link farm heuristics indicates a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8187

Heuristics 4

  • 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://huntic.ru/uplcv?utm_term=medicinska+mikologija+pdf PDF link annotation
    • http://kqcme.yiaiwang.com.cn/upload/files/toxolim.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec57e20df7---xakifapawufasaxezino.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2c7f2b1ba---kubogaganedemozexev.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080bd049ba7b---varofetunedezuka.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/kujijuno.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cac4e1aa5e3---6891356661.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/lebupimug.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160dbb8d457d1a---rolomukotaxavajulupotiw.pdfIn PDF document text
    • http://prociweb.hu/sites/files/file/kuxol.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/76150002385.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/81682976896.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/dugazuj.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/69264034974.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/vimabakasewomulefijis.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/87594505142.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609128b250798---rasidag.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/87593006943.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e29abc5b52---kepowaxerorapogiguxulofun.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137b67374a9e---64438913549.pdfIn PDF document text
    • http://meta-min.com/files/nuvikijirokawukav.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4b51a302ad1860af987af76e674aa9ad/kebesudofijokiv.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/5250e5087fa98406cf8f5c6fd0d06d2e/pefisovunadediwalok.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/2d6feaf8acbb7221dc7505f223ebb56a/18216605784.pdfIn PDF document text
    • https://advik.net/userfiles/file/84858929616.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e60cbfc818d---10570131646.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_off0000be98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE98 16928 bytes
SHA-256: be318b974d812598ab525d554cee788aef58750df26436b69bc20f57e19ccf53

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