Malicious PDF — malware analysis report

Static analysis result for SHA-256 d664b2d65dd1b816…

MALICIOUS

PDF

88.1 KB Created: 2021-09-23 20:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b5ca7147ff4e93716c52e08a0020ce1d SHA-1: 1fc2cf55cac7e2e226d6167e3c5c22358bcf1676 SHA-256: d664b2d65dd1b816c17aa9899d2c5e193f0e9631c557f0aed9f94ad3b2deb13c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent. While the document body is unreadable, the presence of JavaScript and the link farm pattern are sufficient to infer a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ipayon.com/root/FCKeditor/file/jozizadar.pdf In PDF document text
    • http://mywayrtk.info/userfiles/file/14136489370.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/vufezuxikifogabomo.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/peduxoni.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/14834381516.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/pilenosaxenemokatelokixaz.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/femefowedobum.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/54703206591.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210908_9449EEDE8B25025B.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/bagugesosugu.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/sawax.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/88158957880.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/254376186.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/99291067477.pdfIn PDF document text
    • http://bbmpva.nl/fckassets/file/zesikegotojunog.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613285f7ce575---zukatez.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/58830150417.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/1346917361.pdfIn PDF document text
    • http://theatergruppe-nestelbach.com/rogan/admin/fckeditor/bilder/file/78173270532.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/74851118700.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/38552016621.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/gobevafasarenojewabotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=watch+football+free+online+livePDF 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_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 18352 bytes
SHA-256: c014925a94666ddef08824ef35f53bfbb5b966cf245d12a215f7bd40a96e2dbc
font_01_sfnt_off000122f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0E 10464 bytes
SHA-256: 06aa53c5f2970988bd66b933b7f19c239105fd5ae4276526c842387f3d42a425

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