Malicious PDF — malware analysis report

Static analysis result for SHA-256 014eb64b342acbab…

MALICIOUS

PDF

87.4 KB Created: 2021-09-01 16:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: df6a4aba1bb0c144bae3bf930f3853a0 SHA-1: 3094270bc8f03930f44959a6c405a569cca6f4ef SHA-256: 014eb64b342acbab06892bbeeca9bc5c568311e08ad4d3e5c7669c9dd7a5cbb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple potentially compromised or disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://riverside-plaza.com/upload/userfile/files/wekanuni.pdf In PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160719117a5232---76811684468.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/90025234908.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/bc534956e2c58d710a89a85469ea0804/pupaketoxazi.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/1073735149.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/sirotefupebadinaridak.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/judogojizapuj.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/10038510651.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/45780072964.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/volaxazalutilino.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/13276645796.pdfIn PDF document text
    • http://techhssilverbuffs.com/clients/61416/File/51428838875.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/vonat.pdfIn PDF document text
    • http://ttc-investco.com/img/files/58938180125.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/fizalumarizela.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/36432255599.pdfIn PDF document text
    • http://chongros.com/userData/board/file/zetugotupumawilawesa.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160838a484c3e2---xirepirawuvuka.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/nutijunonide.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/67825007221.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079209a4b041---79024946831.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/genumexajetezodubufu.pdfIn PDF document text
    • https://brod-plovdiv.com/images/96563955981.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/mo7vcd4oupltv283vql74ntkl4/sajijivexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=letter+to+archbishopPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8234ceca17683f174c522f8f42b50048/63733955926.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_off0000ef5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5F 10420 bytes
SHA-256: 6eac09e0f904786146414046014de22a3b5442106cfda9f03b15f350ccdba753
font_01_sfnt_off000106e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E1 19220 bytes
SHA-256: a8a51a628e349e0c4c3ca8c646f2b66b096238d0f5f47f79b3d64ba53e9e35a1
font_02_sfnt_off0001380b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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