Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52fbc21c563b11d…

MALICIOUS

PDF

68.6 KB Created: 2021-09-28 03:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e71216dae8144c16064b736ee0b66097 SHA-1: 77455244d51c97474aa934495c68445a2c29f82c SHA-256: d52fbc21c563b11d16bc97b0c5867cfe3946fd396381ba932e052f23c8ddbe66
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, including an image-only interface designed to trick users into clicking a link. It contains embedded JavaScript, which is often used to redirect users to malicious sites or initiate further downloads. The presence of numerous external URIs, many pointing to potentially disposable domains, further supports a phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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 0 text block(s), carries a click-outward action, and is only 68 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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://aminotp.com/upload/files/pebesutidopagavimibemonu.pdf In PDF document text
    • http://myucmas.com/userfiles/file/2178693106.pdfIn PDF document text
    • http://jamones-luna.shopcloud.es/ckfinder/userfiles/files/4289130704.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/fugerakowulifewufad.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/48173496355.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/sosabapomitutofirediwinab.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/88006907452.pdfIn PDF document text
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/tujasezavorew.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/piwes.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/gezibof.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/likujizonobusamoxuzikugoz.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/nolowajowo.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021091111121173499.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/74053098934.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/fusofewa.pdfIn PDF document text
    • http://expertworker.paraleumarian.ro/app/webroot/files/userfiles/files/94862719158.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/subatad.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/92500957331.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/67113494560.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/bixuxuj.pdfIn PDF document text
    • http://home-plast.ru/foto/files/gonajasig.pdfIn PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/85425557865.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/muzevupo.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/28895330733.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/76030786103.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=dream+league+multiplayer+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AB 14248 bytes
SHA-256: 92176d727f1c0d57d2622ab9bda12f804a40df595fe20a81c2024d3d778ae5ae
font_01_sfnt_off0000d3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E0 10868 bytes
SHA-256: a7bc16661b853c168fe3555d8d89e6967a055e633a22260bbdd40440bee078b7
font_02_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1