Malicious PDF — malware analysis report

Static analysis result for SHA-256 9152f8eed13bad8c…

MALICIOUS

PDF

92.2 KB Created: 2021-08-25 02:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9fcb6aa153f5616466a4adcf2571a530 SHA-1: ebb1f3a1bf72f3dffbf3259b412b5679e3fda669 SHA-256: 9152f8eed13bad8c2910fb4223c64042bbf42a035a8bc12728fac80a44eaac19
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect the user to malicious content. The 'Remote-support tool lure' heuristic indicates the document's content likely instructs the user to install or connect to such a tool, which is a common pretext for malware delivery or unauthorized access. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://drafthe.ru/uplcv?utm_term=uff+allah+pashto+song+mp3+download PDF link annotation
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712c98f3612---panawodob.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/43302315112.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ea348dce44373c361035abc1b4c195c3/3337672637.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/7096419913.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/41012263333.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/6658828182.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/21658296741.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/b7e5492f56c14b1979255dabf0ead6f6/196094646.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/13778394572.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f704ec0806---zixoravuvimazotowosoxu.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075801125835---lopifaxegamojum.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4aeb32ffc---weluguduvobuvito.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/0d3294a109459d08f3f5981ad6a176b0/85486122159.pdfIn PDF document text
    • http://bastola.org/userfiles/file/36727557192.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/38670930793.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/88776502813.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23ab0572c4---sadofeja.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/dabidebokelopazimujinuz.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc0aeee1aa---zixoranoko.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/53938805062.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/c9386ca8913d398ceda94837646630b6/mipusijedaka.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41c90e9e67---zijewizupegetuzode.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/45078013181.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/0oqpog5bq6dj1mvcvaejao0n31/noranuvanobozusedaz.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/83926266288.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_off0001056f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056F 10884 bytes
SHA-256: a8fe3ceebd83ee40ab8f78d09f0721e97561b66afb375def7f465c473c061b9a
font_01_sfnt_off00011e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E52 17076 bytes
SHA-256: 5b224d5c42e2f8bac7a81b698ebaa24e2bfadaafa17a1ae99f6bd6fd2fc8b561
font_02_sfnt_off00014a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1