Malicious PDF — malware analysis report

Static analysis result for SHA-256 23308b72cecd5c03…

MALICIOUS

PDF

82.6 KB Created: 2021-09-19 14:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 502d4baf547017d90d7dd5d2131ffe0f SHA-1: 3bb63803a0dc633008f8c330a49cf798069d16fe SHA-256: 23308b72cecd5c03ad8477f0a78c3e5cbd018a06a7c8098a736d29892ddff8fe
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

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
  • 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://pixomot.ru/uplcv?utm_term=cool+math+wingeria PDF link annotation
    • http://neuroxl.com/images/file/92751520431.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/96919991431.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/kanedokefanimeme.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/35505853661.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/sulalagisa.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/88146001962.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137362119952---rigunomejata.pdfIn PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/36112404230.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/27841401440.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210914_20D83DBD441A0051.pdfIn PDF document text
    • http://1666-3668.com/attach/userfiles/file/99115711830.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/keves.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/sanelofenugedagivumatoza.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140bbf77029a---15993360093.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gejojetokiwonofomenej.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/98527939801.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/lojojeb.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/178488437.pdfIn PDF document text
    • https://onecre.com/images/content/files/sebagoz.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/30187881048.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/81358712568.pdfIn PDF document text
    • https://expobar.vn/app/webroot/files/images/pages/files/dufoxomoburajik.pdfIn PDF document text
    • http://wuchem.com/upload/files/45655571779.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/45728396720.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_off0000d9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 10504 bytes
SHA-256: 70862d63d23d38cab11db180cf9beab5781ae182df5db08db3022140a612dfb5
font_01_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 18780 bytes
SHA-256: c9ee6d662ba122f2779c9475ec499a6239a38910c7717574e9e96e3654e8d013
font_02_sfnt_off0001230d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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