Malicious PDF — malware analysis report

Static analysis result for SHA-256 3382119c1e2b721d…

MALICIOUS

PDF

62.3 KB Created: 2021-09-10 15:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6075c41948814141dffce34ee040eac1 SHA-1: 91dd57579d9a38b6778993e4ff6eb4e32e67f6ae SHA-256: 3382119c1e2b721d09142546ea12b9d81570503ee8305a034e12c38b00ace0cb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7000

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://lgassociates.in/uploads/jusunimekaveme.pdf In PDF document text
    • http://signauction.net/userfiles/file/55364927069.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/34331614851.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/58563148201.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/lawomawotezorusavizatim.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/kevib.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/pajamaredizuniwiv.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/64497247917.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/kemajowagefefog.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/17147722281.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/muvoripumisifadamek.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///48396700217.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/tiribitodiforo.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161302cad2fa38---57731111063.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/kemazebogefumosemakoji.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/89664889284.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/84775151669.pdfIn PDF document text
    • https://bfull.ru/uploads/files/begogugixuneniz.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/nerekuxafef.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/kipubaxetapixafiwilapig.pdfIn PDF document text
    • http://www.truca-taoules.com/ckfinder/userfiles/files/gimunosuwubujigavemor.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/gubivikodoz.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/zibawoxegomibu.pdfIn PDF document text
    • http://kmconlinecme.com/userfiles/file/83475516850.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/goliguwobodewutisa.pdfIn PDF document text
    • https://ripedzn.com/app/webroot/files/fckeditor/file/suzeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=free+avi+video+converterPDF link annotation
    • 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_off0000d5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FA 10192 bytes
SHA-256: 04edc7e4bb797e02db4cb1b4c4c41a9356383ac0d3122e207f3edbfcdba607b8

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