Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8faaef186de02a…

MALICIOUS

PDF

75.3 KB Created: 2021-09-10 02:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 98ad10d66b43a09c370d51ac7f127908 SHA-1: 3eba36c2b2cc88058e7f20ee4b1585fba6d2980a SHA-256: 8e8faaef186de02afc036743e364f1a259b1770a5872444fa97f365b1dfcf932
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a high number of external URIs pointing to various domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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 https://samsungvrvklima.com/upload/ckfinder/files/radawutixejube.pdf In PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/5f4a0c5a6f94066c253fd192f529c7c8/patubog.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/86077488285.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/86728392348.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/wokogup.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/19581721445.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/jijalalezavizamaxo.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/71069323129.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/12971939100.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/17520023839.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/meponiniwub.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/504517319.pdfIn PDF document text
    • https://datenglagi.com/contents/files/xesosuxukoxezinoj.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a409b567fd---vosifigapabijasaroda.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/93607035364.pdfIn PDF document text
    • http://petrduchek.com/files/59014034178.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/keguwasukomezo.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/kubaxezozesuradivoviwo.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/7053039503.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/topiwe.pdfIn PDF document text
    • http://www.llmhospital.com/www/js/ckfinder/userfiles/files/keludedule.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/14206331428.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/52487267253.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/kudemulufenawik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=pptx+to+pdf+converter+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_off0000c395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC395 10568 bytes
SHA-256: 293c1b995a4861e622da68f911b7a047474e4992aa2371730ce4095d05af1147
font_01_sfnt_off0000dbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE2 17008 bytes
SHA-256: 3cb85d603a542db29b6ecb3d474494f6d548f84821e1a290015387755cad6d5a
font_02_sfnt_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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