Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d15e8a3f12ad32…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 22:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7fa0f2334a3e38cda500f66747d45635 SHA-1: bfca287609db1f2fe78fd1f959fb4baa1d423cf2 SHA-256: 93d15e8a3f12ad32c39976bb24d7669c3abc30f1e34144f27269e16810beac6c
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and a deceptive download button lure, suggesting it is designed to trick users into downloading further malware. The embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=android+telefon+uygulama+indir PDF link annotation
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411d4d3b46d---67424133077.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613548953269f---todabuxijelekamov.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c653540e2d---19220035783.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/4984140005.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109031554439400.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/6536da4245a4a3cad591ef3f2beee0c0/solazaw.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/36850238939.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/39681446161.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/79409393041.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613343f35d5a6---foxiligadabevesivelepemup.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/79685793452.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/tapemoz.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/3232136933.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/61316695362.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/91421068311.pdfIn PDF document text
    • http://vucert.vn/uploads/files/tazigoxubaxategurufes.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/lokomo.pdfIn PDF document text
    • https://mayxaydunghoangphuc.com/userfiles/files/gigabawox.pdfIn PDF document text
    • https://pyccenter.com/images/Upload/file/33458850584.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/64325879418.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/raforem.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/pubaduvawejejiket.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/binodizikizijoxi.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/ketodakedoli.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/65085427672.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/linibaru.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/19410146883.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_off0000d46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 10724 bytes
SHA-256: 56df3bcd2ed67f280ebdd20113306e0e1fc220f1bb8cc9deae09cac0fe1ac601
font_02_sfnt_off000104ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 18404 bytes
SHA-256: 01bb57ac1dbbaf6ead4a5128e31e352a8c5dd09eda4a30702d7459a26ca2410f

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