Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a20f984bfa9f73a…

MALICIOUS

PDF

64.0 KB Created: 2021-09-17 09:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fd89547771aa9a3b05d28d12baf093b1 SHA-1: 2292b4f1a592935991f5098abd97b5383607fa37 SHA-256: 1a20f984bfa9f73a2ca26cc361050ed758f709f7e21170186ac1c26e5f93de3c
132 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs pointing to domains that appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=android+webview+call+javascript+function+with+parameters PDF link annotation
    • https://ibexquimica.com.br/ckfinder/userfiles/files/6206127211.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/74928746689.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/61706068274.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/67340791598.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/87206246716.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/gaxedamago.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/97719323208.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/38777447738.pdfIn PDF document text
    • http://sdes.in/uploads/57367567616.pdfIn PDF document text
    • https://alpinashop.bg/files/48288968201.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/47185248177.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139d116b6ae5---43224335232.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/zesegabavejom.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/lapofurizuvefatijawaj.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/nokadiletide.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109060229522707.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/daganilob.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/gokiserexararotorevalix.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/23707615860.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d19428bec5---52354288974.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/72496923409.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/jazotisapatizeb.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/pesebotofagaxukovovupexox.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/noxaxuf.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_off0000d8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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