Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95c4e93f3b2a269…

MALICIOUS

PDF

78.7 KB Created: 2021-09-20 10:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e7cfa0316c27fd109e207098e3207553 SHA-1: dc073d5ad994a8a54fbc5a72c9be30f33e2f5659 SHA-256: c95c4e93f3b2a26905c1f169a2dced1279ede0f5f7e07e7c766c945f1965b84c
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript, which is often used to initiate malicious actions. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The PDF's structure as a link farm on potentially disposable hosting further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • 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://skywaynepal.com/userfiles/file/kepaninib.pdf In PDF document text
    • https://defi128.com/userfiles/files/32646624871.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/83ab1282d1f02a6f97dc099744cd66fb/58980264924.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/98977180753.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d3bbb92eec4b469d160aa9fbe92bc4b0/refebarobuzi.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/22487940147.pdfIn PDF document text
    • http://agilesolutions.in/uploads/74758305285.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/liderisatuk.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3646215473.pdfIn PDF document text
    • http://dgjst.com/upfile/file/wavipubugisadatutugizumap.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/supujanune.pdfIn PDF document text
    • http://rockbond-aac.com/id-admin/fckImages/file/jubekavipetubotoz.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/92954299811.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/felebobuma.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/1161998601.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/16183374883.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/48553159609.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/45654281922.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/jugapofimuguxu.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/96959915909.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/xugoj.pdfIn PDF document text
    • https://tele-video.ru/upload/files/59051842945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=android+cannot+detect+wifiPDF 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_off0000cee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 18052 bytes
SHA-256: 3c9ec03d3d8f71c5650585aa2348fe3445322be712e29e566dfb518fad5e6ea3
font_02_sfnt_off000115e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E1 10324 bytes
SHA-256: 9ed5f1b4c8bfa968ea7484a95d0e24f54327aea5bfa724311a7c74a7d13873d4