Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb302cf1e29fb39…

MALICIOUS

PDF

77.4 KB Created: 2021-09-19 00:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5e4c80e6729d549da647e97ef97bf93e SHA-1: 1df64ac756b795342e5c4256eeff5b341f53e247 SHA-256: 0bb302cf1e29fb398c18f78d73689d9119b63f60ff7a09a1d5bcdb4e3e5b682f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious payloads or redirecting users to malicious websites. Several heuristics indicate the presence of link farms and compromised upload storage, suggesting the PDF is designed to host or link to further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://dispensapertutti.com/userfiles/files/keneronofunisazejufe.pdf In PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/196401fedd039e918eed87fa4bace89c/62525386768.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329403dae60---28662836791.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/zikaxosujesupabow.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/wedefepupokinepapabiperu.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/pafow.pdfIn PDF document text
    • http://samtekelektrik.com/files/binipituvuvobidafitemuren.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d50a3577e---50866260227.pdfIn PDF document text
    • http://naviway.su/upload/files/58740354827.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/zizavikigifugiwo.pdfIn PDF document text
    • http://nhakhoauytinhaiphong.com/upload/files/tegurawemavujaxu.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/35889494908.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/vetizoxu.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/9091323008.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/85182923476.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16319996628684.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/fonazek.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/9461625582.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/64873219018.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/vezibufonunivegetevidov.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/ginukemokari.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/61595282264.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/semamadibesurezipawiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=origin+games+androidPDF 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_off0000c37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37D 10472 bytes
SHA-256: 9d8b25e1033c70edaf273d119725b545bc2ce9f418b8a6e0c79c9ca36c29a40e
font_01_sfnt_off0000db04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB04 20320 bytes
SHA-256: c3ed87ce6fb7d94ef04f53258d75bd8b2ce6d1eea7e87ea4bb0004d93d68a8c8
font_02_sfnt_off0001106e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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