Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fbfb4892b54b9a…

MALICIOUS

PDF

81.8 KB Created: 2021-09-16 01:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5f0925b392ba7d13b92cee3ac2d9730d SHA-1: b0ba0a0df2c2c3f61df500104a0626e027350e6a SHA-256: 27fbfb4892b54b9aa9f4dc320faeed6e686f0b049772f9dc841e97cc82195798
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating a potential for malicious execution. The PDF also functions as a link farm, directing users to various external URLs, one of which is associated with a disposable hosting service. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://websurin.net/UserFiles/File/28693915838.pdf In PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/82675213961.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/78029598185.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/3609080472.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/rafewuxalifusirefon.pdfIn PDF document text
    • https://buzyhub.com/files/mekatoduzorotidi.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/luzofofuvawaxudisafibux.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/duzetoxoxutifeme.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/kokawefav.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/watuzowuborovuxare.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/62702857282.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/6944053549.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/dexodab.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/dasox.pdfIn PDF document text
    • http://strandedtattoo.net/file/dogotopapeteresowuvate.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/87340799616.pdfIn PDF document text
    • http://chongqinghaohong.com/upload/files/15581877836.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/bitanerodosizedofuf.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bimofowozepe.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/2ba012f8487902e4a3f4c96efc9bc18b/76927942141.pdfIn PDF document text
    • http://halanmilk.com/upload/files/33065441744.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/rawinijojibi.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/46329546925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=download+vampire%27s+fall+origins+mod+apkPDF 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_off0000d47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47B 11024 bytes
SHA-256: 4b49dd3b8c5f6716e5c380c55520fe125c4f209c792e0178bbd6a13e460f9ce4
font_01_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10605 19468 bytes
SHA-256: 85f83ff7cdd2956e58d2d220bff92f2781cb0baea12c340157ceae7134131a1b

Open this report in the interactive analyzer, or submit your own file for analysis.