Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce2b1179f4308b5…

MALICIOUS

PDF

79.5 KB Created: 2021-09-09 02:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5ebcb48f6a683209ca27c93eca7273e4 SHA-1: 2380b5ff333180019e109c53b280237106eed8da SHA-256: 8ce2b1179f4308b59bf9b72ca650ad99c0d81825a9f09e620da9d623216c0ec5
182 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and external URIs, indicating a malicious intent to deliver a payload. The heuristics suggest a phishing lure related to account termination and a password-protected archive, commonly used to bypass security gateways. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77184816985.pdf In PDF document text
    • http://physio-praxismitte.de/userfiles/joxemajowopamivafupebu.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/kozemogumumeta.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/92677726089.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/dutifegugebi.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131732cbe230---vajadi.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/73733734049.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/63367025750.pdfIn PDF document text
    • http://ccadl.com/files/20210904200439.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/1381175797.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/mr9gjhb6k93bqoh85as7vvs0c1/49413958454.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/wedan.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/51943938422.pdfIn PDF document text
    • http://sdds.be/userfiles/file/dojatenabekuwanedize.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/jipofujetituk.pdfIn PDF document text
    • http://dsagco.com/Upload/file/midibeg.pdfIn PDF document text
    • https://interconformity.ro/images/file/lolozilinok.pdfIn PDF document text
    • https://patc.fr/imagesfile/41006935689.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/zutomuzuzigobelofovi.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/36589028666.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/luzimiki.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/nezopotimuje.pdfIn PDF document text
    • https://la-klamm.org/Files/files/lukapulovaziwovexaxatosa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=expired+pdf+unlockPDF link annotation
    • http://irodori.kir.jp/files/file/zovulijimufigavegebuxefaf.pdfIn PDF document text
    • 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_off0000d091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD091 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A3 18504 bytes
SHA-256: 9f6241284b85ad9772ff36757f962a4781f497fede112d6ae25a3df0bbf263b8
font_02_sfnt_off00011908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11908 10464 bytes
SHA-256: 08cb9d77ecc2df826bd3e1c7ab00a8dffebba696cb0a06302cf05208d8ddde23