Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba8ccdcab0f044a…

MALICIOUS

PDF

84.5 KB Created: 2021-07-18 16:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd1b2e056dec665e29cb8c2232e55c15 SHA-1: 5fa580bf6d9f7cdc964e0272ef886eb97a9cd2e4 SHA-256: 5ba8ccdcab0f044a4e4e855e37053095355dddd1e85eaa9db5744d5ab0a12f65
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or execution of further malicious content, while the link farm strategy is a common tactic for phishing or distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://sva-jeanroze.com/xmedia/file/nabovanamalubumugogijese.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/3da3f01d6e760bcd7111208e874f60fa/xajerezojegelafupomipa.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9bab78b38---munolawekapilogevurebup.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b970c9dd88e---91638221460.pdf
    • http://dyglas.com/userData/board/file/nikuraxutawakoziterej.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/48834a6405286d36c71bb8475caca27e/21839793142.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c791b304c3d---damureber.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/suv8oq8bnpvc1p6jpvdklnb1d5/15904022413.pdf
    • http://kemenyseprosiklos.hu/upload/file/62297663904.pdf
    • http://pospatrans.cz/UserFiles/File/vululivewowuvumikiled.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/5ms8p72ltltjmf7si3im638566/puwovule.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/8d6b898a4d633e8450350f51d60a5ced/36160981959.pdf
    • http://irishvaughans.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/29001889961.pdf
    • http://ebslang.net/_UploadFile/Images/file/31447238806.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c92980ae8a4---94568142699.pdf
    • http://irina-beha.com/ckfinder/userfiles/files/muzunivonowakiwi.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/dced023dd8a10e72e198779bd2974c90/jibeviwodivoripanisus.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ccd5bd360d8c640c946e12cad7275340/17470161973.pdf
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/11548610893.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743de8958e0---jipowa.pdf
    • https://chiataiec.com/userfiles/Proj_Name//files/boxuzid.pdf
    • http://soflocops.com/clients/67403/File/83508523272.pdf
    • http://riggi.ru/userfiles/file/60852060750.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/7an6gth0iq3mbvvjgd8t4op54r/37207347118.pdf
    • http://snap-drone.com/userfiles/file/lefeririteranagajumen.pdf
    • http://20thhelicoptersquadronreunion.com/clients/71358/File/dikaribanalup.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=self+evaluation+for+job+application
    • 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_off0000e9be.bin
0dc03e75f0ffeae42d944f61e5e63b7b091fba944878a36e92967827b3346dfa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BE 10816 bytes
font_01_sfnt_off00010299.bin
6010d303f01bde01bd6ce0c6466159b8c8e7d8a7c91bc6c1b9b30a94f61f8e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 16180 bytes
font_02_sfnt_off00012c45.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C45 16792 bytes