Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6989d6cc83a447…

MALICIOUS

PDF

84.9 KB Created: 2021-09-16 06:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2a8bda2689818d59e7afd317887c2ac7 SHA-1: b74ca353110805e8c4c7d2ac436f4bf716e1bdb2 SHA-256: 2d6989d6cc83a447845d955a2658b030ac67d80e81e36ebee1495fa49915073c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to lure users. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is intended for malicious redirection or phishing. The presence of embedded JavaScript suggests potential for further malicious actions beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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 https://pixomot.ru/uplcv?utm_term=fortnite+apk+ipad PDF link annotation
    • http://sevennews.com.br/ckfinder/userfiles/files/49905204305.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/wojafifemetumitisezuwu.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16140f8b98d189---zozedujoduxuva.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb0da9c557---39504537988.pdfIn PDF document text
    • http://katachizu.com/img/news/files/donawokewuwutojaj.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/85093984817.pdfIn PDF document text
    • http://unityproductions.com/upload/files/titojomaxidajakugatekaje.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e61dd93595---zitufobebafojijijibok.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/47266843783.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/754935bcdd4485eec1ef0c20f05504c6/xejesulapodubigogenu.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/84945487003.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/67825068208.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/bejukitedozutoxu.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/zixelozaxabikumi.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139378920114---47585937458.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/rugelogaxix.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/sikim.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/jubogugijatekixik.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/7337389691.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/pusogizazigureterezipes.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/mekuwijonumasuwuwiwuwakim.pdfIn PDF document text
    • http://emusicmarket.com/upfile/board/files/21139585422.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/soviko.pdfIn PDF document text
    • 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_off0000e4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B4 19360 bytes
SHA-256: 507185d41672c3f4e718c3de9cc4de60b270b871b1ca2aa3d72e205f64b15736
font_01_sfnt_off0001173f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173F 10240 bytes
SHA-256: 909da4521c9a27b4844d7bed93b7170a9040583268dbb6cd14393c5a88d2ec8b
font_02_sfnt_off00012e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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