Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea69c6b85982268…

MALICIOUS

PDF

75.0 KB Created: 2021-09-16 02:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2192c35c9a07cc9e7890f5bfe2e620c4 SHA-1: 26bd69551330e0598070b7d9ef104051e63b7679 SHA-256: bea69c6b8598226800efecabb5209ec1d2a545a9fb4aacdfbcce761bb872a655
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites. The high number of external URIs, many pointing to disposable domains, suggests a link farm or phishing campaign. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://degeninhotel.ru/admin/ckfinder/userfiles/files/netekenedowolarilud.pdf In PDF document text
    • http://www.pzkexie.com/up_files/file/9034602643.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/jurizevitulegutedowapewu.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202109050812006855.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/kazap.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/27533830352.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/21573017265.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/kepunuwezaxupuzujeribek.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/losurufan.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/kolefirisenisafa.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64066365283.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/pusikabozizijibitu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161401b62b40e1---41258900036.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/62313661801.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/67093974938.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/33459429465.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/42300974680.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/0b10e43df81856c825a00f6182d4437d/1129764058.pdfIn PDF document text
    • https://tcremich.lu/files/files/punavolinix.pdfIn PDF document text
    • http://shopabrang.com/images/files/luweburukatezafol.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/dudexi.pdfIn PDF document text
    • http://irths.com/upload_files/files/46649591790.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/vidute.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/56420863319.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/gomor.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/22300054452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=alien+shooter+2+reloaded+cheatsPDF 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_off0000c0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DA 17268 bytes
SHA-256: 38dd79ee1228f125888f63a955d8a94b26b34b14de1590abefabb57b819c2e5d
font_01_sfnt_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 10568 bytes
SHA-256: 006b19125b7c6fee9394aacc452940aacd33525d2d97895a497d779afbd572fe
font_02_sfnt_off000105fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1