Malicious PDF — malware analysis report

Static analysis result for SHA-256 448f3b3565aa75be…

MALICIOUS

PDF

76.9 KB Created: 2021-09-17 00:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dfa7f74efa945f6eae6a7827e7187df9 SHA-1: 2fd50a990db1c4f9393c38cb97f00ba633473bb9 SHA-256: 448f3b3565aa75be9eb82c192ddd620c1e2578f99a8d35b539b64518f122af38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to a variety of websites, many of which appear to be part of a link farm or hosted on compromised infrastructure. The presence of ClamAV detection and ML classification as malicious, along with heuristics indicating compromised CMS uploads and disposable hosting, strongly suggests a phishing or malware distribution campaign. No scripts were extracted, but the structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://philabc.ru/uplcv?utm_term=best+pdf+library+for+android PDF link annotation
    • http://andlupa.com/userfiles/file/wilifazoxalalivijajideko.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202109110756519127.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/rixizukuduwaxazizovojodi.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/kixipivanuwidifirot.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/fc30be874e386940b39a64b0f198f0e2/giwituwefopiruxa.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/13003860579.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/14864810044.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/vofujenumemasu.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161385e8e316e8---42846824140.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/64545529550.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/50888520917.pdfIn PDF document text
    • http://esejsc.com/upload/files/vuponirugonapaboxiza.pdfIn PDF document text
    • https://noventa.cz/media/files/file/12981950911.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/20779320399.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/40213549047.pdfIn PDF document text
    • https://titishop.co/upload/files/19769127124.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/wawidivuresedixatafagumuf.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/21093416609.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109090051073424.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/19855629715.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161413e6ec9ec3---90145181521.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/44207783000.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/31963701657.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/68541440225.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_off0000ca8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A1 10796 bytes
SHA-256: 31a91844898c9b0b40d304e623271036c08fcb7beded738b34264603a141eea2
font_02_sfnt_off0000fb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6D 16908 bytes
SHA-256: d0076cf41762a60eeb157364aa8f7a9d5b63bf9a7679cfa41cead51fd32eb335

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