Malicious PDF — malware analysis report

Static analysis result for SHA-256 e927822d27384404…

MALICIOUS

PDF

49.8 KB Created: 2021-09-29 02:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f59bb43921f5d79fc4bd069d6a2357db SHA-1: 611c81e3833e3e13fc896de4a83812b06b73416e SHA-256: e927822d27384404c25a2bd7a845c9a49fb706dcc43a3de9190c82e334651278
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing or malware distribution. It contains numerous external URIs, including one pointing to 'coretry.ru', suggesting it's part of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to download a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9346

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 49 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=can+you+lie+down+a+fridge PDF link annotation
    • https://gulf-rope.com/images/bulk_images/files/zamutufixudiwegawajexibu.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/15733264226.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/64438553126.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/30747225032.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/ladunobiwedixefulirumuxul.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/vujox.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/lilelukemizikami.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/38796765576.pdfIn PDF document text
    • http://progetec.org/userfiles/files/32256787844.pdfIn PDF document text
    • http://baoveantam.info/upload/files/givejizujugul.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/ludidamobotidibusatejoni.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/28670193741.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/vikuliwemurowidutigibem.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/99957570836.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/13944349393.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/ruxexefegevujaranufi.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/8358381154.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/ditolariw.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/fativizofu.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/161505e11e6232---wubimujegibetojiwafet.pdfIn PDF document text
    • https://mangallagn.com/images/file/57702198304.pdfIn PDF document text