Malicious PDF — malware analysis report

Static analysis result for SHA-256 29573eab6dfe7bd7…

MALICIOUS

PDF

78.4 KB Created: 2021-09-17 03:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 49c79486eb60b740333a30228bb9533d SHA-1: 18005c5ab85bb5acbb71a17d74b9613a9c69b7e6 SHA-256: 29573eab6dfe7bd7193a2a5e74621b3ddf2749b247a08fa38c33ab93d3cea809
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to websites that appear to be compromised CMS uploads, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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.
  • 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://jl-vacuum.com/upload/files/nubodadoxag.pdf In PDF document text
    • https://hw-power.com/uploads/ckfiles/files/613f643a669f8.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210903_035511.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/34826350743.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210904180210.pdfIn PDF document text
    • http://offerparts.com/upload/files/dibuzosibilezog.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/ruxolutivamov.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/bgfgsj8qsihvbivdr4f2mteeh0/68195901578.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/17/nojekafiveralilamutivuj.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404eed9541d---lunuxega.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/xoselenasoxatuva.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/32461247064.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/kaxide.pdfIn PDF document text
    • http://gammatradings.com/userfiles/file/65794557882.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/zafebavovoragusonudofe.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/34710368932.pdfIn PDF document text
    • https://cmoretv.com/userfiles/sojujotatowudizulirolak.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/55631582356.pdfIn PDF document text
    • https://pcetravel.com/files/file/16633881341.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210907122133.pdfIn PDF document text
    • http://rockbond-aac.com/id-admin/fckImages/file/24703384592.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/28268111155.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613658a3547de---tabofegaxizajizibeve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=barrister+babu+7+june+2021+full+episodePDF 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_off0000cc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC69 17784 bytes
SHA-256: c413f7251339f4ab38d7fe598e1f2d8eb2295ec3bbd5a134bb8440a7a687697d
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 11260 bytes
SHA-256: b127c9fd6a94fc5229aa2e42826b753a09a202b6da34a6459011512f02c4efeb
font_02_sfnt_off000114d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1