Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17053240948137c…

MALICIOUS

PDF

82.3 KB Created: 2021-09-13 16:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86359bf9081db6678dc96b48ebed8e9a SHA-1: 40f4692fd40c50628fa60f99d704b92aaf761191 SHA-256: c17053240948137c8bdff9e21bd4a941316ceef2e292acaf76c47a4e6f5a00ec
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely serves to redirect the user to malicious sites or download further payloads, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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://zaintik.org/files/galeria/files/kaxenufedufokizibe.pdf
    • https://activepymes.com/pub/file/75685740776.pdf
    • https://strongpointmarketing.net/userfiles/file/5743904785.pdf
    • https://onwater.my/uploads/file/91161695399.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/48a52a53f68d4f5f6327bad17090f74f/liwuwe.pdf
    • https://eastmangroupllc.net/ckfinder/userfiles/files/tusatoketavig.pdf
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/zaginox.pdf
    • http://4rrecycle.com/files/file/wikikazi.pdf
    • http://ivankotov.ru/img/lib/file/55260011300.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b70f2d3c6---dibegofetekenuzikeve.pdf
    • http://dakov.hu/_user/file/pufukem.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613761371f335---rodaroxovupalabibo.pdf
    • https://haltia.mx/sii/ckfinder/userfiles/files/51255607978.pdf
    • http://stefani.cz/fck/file/gaduxezokumu.pdf
    • http://digitalqwerty.com/ckfinder/userfiles/files/64486862909.pdf
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/47427995569.pdf
    • https://alcoquimicos.com/ckfinder/userfiles/files/kepizawidev.pdf
    • http://worldofpacifiers.com/editor_uploads/system/files/koxewoso.pdf
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/somifawunar.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5ec790aca---zodesebiw.pdf
    • http://maraulsan.com/ckfinder/userfiles/files/30016316249.pdf
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/xasejorowesonuboxok.pdf
    • https://skiclubraonbaccarat.fr/pdf/kukakikomozugob.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=blood+diamond+full+movie+with+english+subtitles
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94f.bin
b538110afa380a68a3a926dd6aea246ad9ff4dff1ae5c3abf5b894fc842b6c3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD94F 18664 bytes
font_01_sfnt_off000109ec.bin
2eb2111b1ab9ebe7d63db36e8c8235e154d40ca643f4c32b940a93a81f2dd68a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109EC 11148 bytes
font_02_sfnt_off000123a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123A7 16792 bytes

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