Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99eeeb409868ae2…

MALICIOUS

PDF

70.4 KB Created: 2021-09-29 00:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 13c0202ce97aec5f3e4d15d62c944677 SHA-1: cca6b93ef0478447cf55ce8e0630b3369cb05aac SHA-256: a99eeeb409868ae2e6d8ce82e721370716c61109125f2c5f29ad6448e542bd81
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1071.001 Web Protocols

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious content. The file also includes numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=periodicity+of+elements+pdf PDF link annotation
    • http://awfiowv.love-mrt.com/upload/files/42438084431.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137da8fc0df1---62262356789.pdfIn PDF document text
    • https://onlinendttraining.com/files/63884642234.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/newumimuzuvozamipo.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/a9l6mdu39imatftpfb17akgf6f/lebapawa.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614adc5f0bfd7---20892606852.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/92115698338.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/nozofesozibexulikedel.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/5781530688.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/getevusulifofamidox.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/mojijunanomekonarodo.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/759336231.pdfIn PDF document text
    • https://recrut.com/files/files/37898375632.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/a34ec499dc96e358f4e2c6eb78bcdd9e/mupixexavifenalivukoneve.pdfIn PDF document text
    • http://houselandia.ru/files/xutexegoranilosigebepas.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/76772587785.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/lofanomuvojekikoruduto.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109170521412018.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/fakimavofo.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/zanugabuzuvusisa.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/vosotipuvobibikato.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/33341893925.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/jopizikipiwenabewebebefaj.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/3758185403.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109020921286090.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_off0000b459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB459 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6B 15368 bytes
SHA-256: 1d7c7fd663f95a49b60a7a071f1c398cd91a5490fd036354e44f5c9f6c895796
font_02_sfnt_off0000f321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF321 10732 bytes
SHA-256: 130e88d4635b17062fba600b475907a44ea9587227026467f031091329b6d277

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