Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae6df7e0d517cc2…

MALICIOUS

PDF

69.8 KB Created: 2021-09-30 12:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00cfbec445e688f873d7b8dce415d645 SHA-1: 47ef9403700d2cc8b73b4509d669ab4c00003947 SHA-256: 2ae6df7e0d517cc28e3b4a479c7db2b0224fe39229ad7c02809a714a251b4835
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and trojan delivery mechanism. It functions as a link farm, directing users to various external URLs, one of which is specifically designed to download a film. The presence of a 'Password-protected archive lure' heuristic suggests the document is intended to trick users into downloading an encrypted payload, likely to evade initial security checks. While no scripts were directly extracted, the PDF structure and numerous embedded URLs point towards a malicious intent to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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 https://oniceh.ru/uplcv?utm_term=download+film+mariposa+full+movie
    • http://firewheels.pe/userfiles/file/4184021837.pdf
    • http://sarkanyhajo.hu/files/file/dazugodo.pdf
    • https://gazeta-msp.pl/user_files/File/21668059019.pdf
    • https://812423.situshoki1.com/contents/files/87205230369.pdf
    • http://hanshintech.net/data/file/rexajerafotemozit.pdf
    • http://sevvalturizm.com/rsm/files/jikufakefinez.pdf
    • http://amirmazandaranihospital.com/ckeditor/files/files/4420680031.pdf
    • http://meuble-tunisie.com/userfiles/file/kijidifet.pdf
    • http://stjconsulting.it/userfiles/files/9263566061.pdf
    • https://acconpriti.com/ckfinder/userfiles/files/muvixadapesap.pdf
    • https://ccar.host168.com/data/fckeditor/files/vepumupidimisuxagurojo.pdf
    • http://beachfirebrands.com/userfiles/file/gibapakakezipine.pdf
    • http://huijingweb.com/upload_fck/file/2021-9-28/20210928140811988496.pdf
    • https://gionggiacam.com/ckfinder/userfiles/files/kokowojotetevalibozu.pdf
    • https://paulogomeslda.com/userfiles/file/30126280869.pdf
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/34465480956.pdf
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/26470280586.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/vmv0ovmr6pjmepr3sdniq63mh0/23993301335.pdf
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/62988080382.pdf
    • http://nm-union.ru/ckfinder/userfiles/files/kadubelene.pdf
    • http://bigcool.net/webroot/img/files/lerar.pdf
    • https://fleuriste79.fr/ckfinder/userfiles/files/41646580230.pdf
    • https://krainaogrodow.eu/zdjecia/fck/file/13510107411.pdf
    • http://wang023spa.com/userfiles/202109file/2021090520262370554.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8dc86aa1qsdac5bhstrsvpkhde/80078535005.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b37e.bin
72efd721e598c07d94c5e17aef9061c83b794c6fa8fcd1a34baeaa647b3c9de5
pdf-font-stream PDF embedded font (sfnt) at offset 0xB37E 14660 bytes
font_01_sfnt_off0000d83e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD83E 16792 bytes
font_02_sfnt_off0000f055.bin
d1fbd1ed350a6ea1acda4f813400c0d1fe19fab09073d80259d0ed4c70ca1a35
pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 10816 bytes