Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb3ef16cfc58075…

MALICIOUS

PDF

76.6 KB Created: 2021-09-08 02:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5207dbc8bcdd4266a406d99c16ffe8ac SHA-1: 1023a2e82f25a3d088b2558076c7ffd0f01c6ff7 SHA-256: 9eb3ef16cfc5807537405bb095e504e6c58ded9322671431a675e5e85e798937
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. Heuristics indicate it functions as a link farm, with many URLs pointing to disposable hosting or compromised CMS uploads, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://myapartment.de/web/editor/files/zusesosifino.pdf In PDF document text
    • https://forexinc.ca/upload/editor/file/2545711326.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/90575635634.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210510025734731.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/melazifuberira.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/ziloziwaxebilewofox.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/1a1a33b75dbd8143b5932d3b48f1e3db/mufebavujuposusepogije.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/74469800370.pdfIn PDF document text
    • http://hopkim.vn/upload/files/tuvaxevuzezafulesomipewa.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/80708569373.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/bowanuwijodo.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/dunilugojunuki.pdfIn PDF document text
    • http://newtrierreunion1962.com/clients/6/64/64567561842b0bbd40b956adda0282a7/File/pafapuruwel.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/895e3a24788c9dc7e6753720712ef421/7376730063.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/riduremufarev.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9fab82ef1---7650979877.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/94488346780.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/gefiriloxu.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608439394321b---zipiruna.pdfIn PDF document text
    • https://aaaxxion.info/images/file/sefipudazig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=upstream+advanced+c1+3rd+edition+pdfPDF 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_off0000bce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FF 11032 bytes
SHA-256: f16645263c8b3e63be345bd877cd635dc2f703638d1d9157eca7ffae81fc0316
font_02_sfnt_off0000eec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC8 21028 bytes
SHA-256: 1a56779cbc853b6bc5b9cb58c81c5905cc20e731960e89515501493ce729ab68

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