Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49452a4a6e61bc1…

MALICIOUS

PDF

72.6 KB Created: 2021-09-21 04:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fad27cdd1e230ed22ae0fa90af1f86bc SHA-1: 728a626ec55248bee7786520e616f23ace546289 SHA-256: e49452a4a6e61bc1f4b527632333b3a7d6fc93b08a5a14d8eadb9331c7a7a228
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, including links to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for phishing or malware delivery. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute malicious code within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=free+barcode+scanner+online PDF link annotation
    • http://wahluenfty.com/userfiles/jilofogasubukiwedo.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16149074cb3675---32925320340.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/kikoxozijal.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/fevixegelurefilozutopo.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/68878908236.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/19109557575.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/samirifotetiravigonun.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/kigixojapofisetemiw.pdfIn PDF document text
    • http://carbonelite.ru/file/nizatidewipobe.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/binakajozufuzadirosagiz.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614455d68133e---74876566.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/29666215524.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/23913435689.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161302c982d6ab---90494096565.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16145b905ad865---39288361385.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/dunineb.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/noriwuvipovidax.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/rimatuvavewuterel.pdfIn PDF document text
    • http://chamdure.com/DATA/files/ramafisewin.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d73fb901cf---68191206201.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144b936798ac---48386273382.pdfIn PDF document text
    • http://vhshf.de/File/vifibovesemume.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/xexal.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/74333953249.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_off0000bb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB40 10384 bytes
SHA-256: 0f8459bca22777cb09f77501e7e82bc50ec6481f27341cfda030a5a7a5a67942
font_01_sfnt_off0000d2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ead5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD5 16228 bytes
SHA-256: df1af0447cb5ef14de0ed4e384cd82a43efaba2d9b577e2176be016b863d1c12

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