Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebf218a76ebb259…

MALICIOUS

PDF

69.8 KB Created: 2021-06-06 18:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 872b877f462f72c385dc7349be83151c SHA-1: c00f3851ac44b753f4ccaa82c3f2fe13abe84b7a SHA-256: 1ebf218a76ebb25999c5153207d1b8b22fbe11620b219fe29c48a0e02312d0c2
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a distribution or phishing campaign. The presence of embedded URLs and the overall structure point towards a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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://garglob.ru/uplcv?utm_term=how+to+find+minecraft+seed+map
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ft8qagq0o2f7n5cmanvek6ukrc/84408512526.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24ded30f05---nixezibedanulexuza.pdf
    • http://maslag.eu/userfiles/file/gisulosanesesumiwu.pdf
    • http://93564497.com/userfiles/89445123292.pdf
    • http://abaj.cz/UserFiles/File/buwudalujamikis.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609842fba7dd2---26837170683.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7798fd867e---paluxegidekenuzipipa.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed4106fa08---wewupunilobolizabavad.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e71f48bf28---bosadijajulaxovejug.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6e5683e07---risodolexizipidepofinizi.pdf
    • http://pappteam.hu/userfiles/file/20262493291.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609faee0e41a2---vugejetusape.pdf
    • https://go2germany.ru/files/file/76531522644.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098da56ae183---xubatubevomelokigoluga.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/kium4g1ti1g217k46v84ks0inv/kibuwem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d48b.bin
0eb227d115a86101110d56f90d9f401bd438748415c1cd838e7fb50e0e2628f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD48B 5320 bytes
font_01_sfnt_off0000e69e.bin
4c44657547ad87d48d99f92aa76e92aa71bfedb0fd34999e78c1d6b294482024		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE69E 10556 bytes

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