Malicious PDF — malware analysis report

Static analysis result for SHA-256 83eb21d28a3a4054…

MALICIOUS

PDF

73.4 KB Created: 2021-08-15 15:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 307360f490f887ab7e3bef8456ff8a2d SHA-1: f622eb3ede0495143848025a89d70491f41cf700 SHA-256: 83eb21d28a3a40543d9169781841c0f9cb331d5cd0d1e468ebe389b493848e25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload storage or disposable hosting, forming a link farm. The 'utm_term' parameter in one URL suggests a lure to attract users searching for specific content. The primary function appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://joesservicecenternj.com/userfiles/files/norenekutavo.pdf In PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/85476975894.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/e3c38ca4ee30ad73d2c2e8e7d8712847/73766507954.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/gisebixazuxibufexi.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/mofoferunejibusosujisuli.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/29783066813.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/nukizugagad.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210814045719.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cf884e42d---sulubebatekebutijaponizat.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210429041417107.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/302327202576.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/22b96a70141bac006f9e6b7dd55ecbfc/xexexonironama.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/54139122431.pdfIn PDF document text
    • https://actor-conseil.com/files/file/nasanig.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/15029209144.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/1329117b4bc3d018dd171b1f97539a53/30153131960.pdfIn PDF document text
    • https://t2sc.me/userfiles/59496612015.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/wagow.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/78910377762.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1be19ddebd---20993613497.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/31937510046.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/62512370177.pdfIn PDF document text
    • http://beijingteye.com/upload/files/wavirabewema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=descargar+mods+para+ravenfield+beta+8PDF 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_off0000ba49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25B 15980 bytes
SHA-256: 584ee5885abcc2e8c7dabba41ff254caaaf9f33374884efa78e4cf3f5e0e1fd1
font_02_sfnt_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 11376 bytes
SHA-256: a4599b0e9900ead9d38e67ff3a6f07dcbc59f18ac231f71d53d6737162d80007

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