Malicious PDF — malware analysis report

Static analysis result for SHA-256 871749aa9d7edd63…

MALICIOUS

PDF

78.0 KB Created: 2021-10-10 00:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a7d0b766ae89745367eb869962f1e0b7 SHA-1: df1533fe373e8a514b1ef5615deb1f0fbb9adccd SHA-256: 871749aa9d7edd6360835c24a48022c9e3275f64ce2407f8a66d146a067a87b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to numerous URLs, several of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL analysis suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://girilawfirm.com/content_files/files/82012521915.pdf In PDF document text
    • https://minlinart.com/archive/upload/files/wuxoxerew.pdfIn PDF document text
    • http://reestr.fgosvo.ru/files/files/jevoxawub.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/65e46cbc0a21fd0a3d1c4bf8d9767699/28114850086.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/18419629480.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/36147132514.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/48362834948.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614b95dab3fb3---fonexekesiwewelop.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/44791742614.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/pepibonuvuriputiripifal.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/xenimigelafiguv.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/wadej.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/60169297224.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/31978143151.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/60921448485.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/35051795556.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/111441457290.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/sepuxideneko.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/lokude.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/kibaxovuriji.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/jokenis.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/69592828508.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/dbc4b71749cc5f9ef3dc9cb779f5cb59/wabum.pdfIn PDF document text
    • http://ducthai.vn/userfiles/file/86252791483.pdfIn PDF document text
    • http://kocovnici.cz/userimage/file/jasetesalagutujul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=road+surfacing+methods+and+typesPDF link annotation
    • 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_off0000c7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F0 18936 bytes
SHA-256: b6dfbfa30ead8828f6ff5551ae6b8e5b788fe4b16337b2cfd76f02498b6a0c5a
font_01_sfnt_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11009 11280 bytes
SHA-256: 28c0be6f5981d7819cfac59767188331ba336570e5ffc9c88e81e5c732d1925e

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