Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe474b238fda9272…

MALICIOUS

PDF

69.7 KB Created: 2021-09-24 23:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a85c79f10d589016db418f5f0e5177ea SHA-1: e25f010ad509dea2fe80d400e71b1077b7a8dca0 SHA-256: fe474b238fda92725941f865ee2828515e2c3dfa2963db6cfa297cf8c30ee067
164 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed to manipulate search engine results, with one URL specifically mentioning 'roblox robux redeem codes free'. This suggests a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to execute the embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://archism.ru/uplcv?utm_term=roblox+robux+redeem+codes+free PDF link annotation
    • http://udaybharat.in/ckfinder/userfiles/files/zuvorurubufevadifunusit.pdfIn PDF document text
    • http://amsuatrust.org/survey/userfiles/files/94055228885.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/maxiluvor.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/fiwamipero.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/49102435355.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135610119811.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/82984092596.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/rupitepisuxex.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/454823231.pdfIn PDF document text
    • https://bawauang.com/contents/files/mudujawaf.pdfIn PDF document text
    • http://badgerhillfarm.uk/gojotaxomabakatoduniw.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/42955247756.pdfIn PDF document text
    • https://alutat.com/data/file/durebegojapop.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/58661237133.pdfIn PDF document text
    • http://nhatnguyen.vn/media/ftp/file/bekoxino.pdfIn PDF document text
    • http://theatergruppe-nestelbach.com/rogan/admin/fckeditor/bilder/file/78173270532.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/12670585529.pdfIn PDF document text
    • https://apelhijau.com/contents/files/xedijumu.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9ed2c6d3d1da3ea5702b04486c178690/jukesulimupawaritesalide.pdfIn PDF document text
    • https://led7.ru/file/segizaragokexopufekeruga.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/bodunovusabonew.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/gs0rko0hk4e4iah1vudooq14e1/31897655726.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/japesutefenoruz.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/23598553271.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/33522047181.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_off0000b089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB089 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89B 16020 bytes
SHA-256: 804ee88fb5ab5c3d448df298a49f5053d77f0cfe6e5d75ac169b688099cac51b
font_02_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 10568 bytes
SHA-256: 25b40bcb5071a594fb4dec7f838496de25bee32bb335e3afb89a47283d1f57d2

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