Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25e20b292db2f16…

MALICIOUS

PDF

79.3 KB Created: 2021-09-09 16:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4283bc1a4cd2714a9e10f5fa761a0814 SHA-1: 2adb9b117fc348eda6f6e7f0e5cb5ebbba23e66c SHA-256: d25e20b292db2f1627c85ea5186ef9df6f0193b89eafae5c1c34b7127494f421
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. The embedded JavaScript likely facilitates malicious actions, such as downloading further payloads or redirecting the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • 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://pistant.ru/uplcv?utm_term=dolphin+emulator+best+settings+android PDF link annotation
    • http://administratieindex.nl/images/uploads/88410496732.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/99786937253.pdfIn PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/jixajirop.pdfIn PDF document text
    • http://canvangdientu.com/images/file/35649472767.pdfIn PDF document text
    • http://yoron.net/up/files/xumugunegirobelules.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e39223b54---23821235582.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/2011320309.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/68220701763.pdfIn PDF document text
    • https://novsport.com/content/File/61863071015.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210909192057_2104084981.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/zawosedogetanadikig.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/mixatojarodowanu.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/betuzofa.pdfIn PDF document text
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/xanaxulutedenebidodi.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/5he3p5v59g3t631ssi397c2og2/xafev.pdfIn PDF document text
    • http://rivucota.com/upload/files/66560604992.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/gekubotajet.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/pojerefabukosudanojopijem.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161320e00b0230---dakevivamaj.pdfIn PDF document text
    • http://zeci.nl/im/image/dezukaxegizogotejuvoxibuj.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/3722519111.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/79970937405.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7c1vm9u6qvqptnolcvnavcpjcd/79774361765.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_off0000cf7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7C 11080 bytes
SHA-256: c8ac0d6593d146fbb100fafa8a0c3e121e6ba628a3a7045e726bec6c19d03452
font_01_sfnt_off0000e899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE899 18132 bytes
SHA-256: bbcbd33fc3cff381ea296667eacf9245e71149c615eb99e849e3dbd81e336bdd
font_02_sfnt_off00011732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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