Malicious PDF — malware analysis report

Static analysis result for SHA-256 2484e2023ff07633…

MALICIOUS

PDF

85.0 KB Created: 2021-09-22 17:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d915eb6badcddb31555c9e4aed892622 SHA-1: 4b1122d1d63b4fdd11f2c9e6b9a5e0b80a21ff79 SHA-256: 2484e2023ff07633acbcb37975fc54a93bb7a2ad86e189f25ed83b20c8922e2e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to redirect users to malicious sites. The embedded URLs further support this, pointing to suspicious domains that are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://inwebjor.ru/uplcv?utm_term=playman+summer+games+3+for+android PDF link annotation
    • http://inbond-cn.com/userfiles/file/3121721329.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161458f79ea4c4---74817157391.pdfIn PDF document text
    • http://byecook.com/ckupload/files/gotate.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/nevimidugus.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/39615715887.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/buxuwilitusibepesapi.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/laogb064pib63th0arrp2nkk47/gawovakuxukomizeg.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/sapexomipo.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/lugatevoxer.pdfIn PDF document text
    • https://km2804.com/ckupload/files/83043444170.pdfIn PDF document text
    • http://union-montage.pl/userfiles/file/5623610190.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/18774994577.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/29803805894.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/lobutezafexuredeterujit.pdfIn PDF document text
    • http://askaudit.ru/price/30292839029.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/71418644035.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/gaxidopo.pdfIn PDF document text
    • http://mbfeed.vn/upload/files/95254441419.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/61739465437.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/lidevefukamu.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/bizadekamulafopagu.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1632335664.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/73420087860.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/fobeluwupiniz.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/94230751021.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_off0000e8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 16896 bytes
SHA-256: a345eaf22312849f6f76cd9450db15fe1305d46f7e9144dd82621bfc569f06af
font_02_sfnt_off00012c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C73 10988 bytes
SHA-256: 679022a187f28be7d8deebe891d323bdfe3d78efa9c4600b8b681fd46da5d9b3