Malicious PDF — malware analysis report

Static analysis result for SHA-256 219051e1ba5ff305…

MALICIOUS

PDF

72.6 KB Created: 2021-09-12 04:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6beac40cdcf87dcaf6c127ea86dd3d37 SHA-1: 30c3c8c6f5d73a114658807215e9cede4eea9800 SHA-256: 219051e1ba5ff305b7f1be7bb53ed7d00315b2d87e539ddeaa615a95c4c20a8e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 4

  • 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 https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/39995546919.pdf In PDF document text
    • https://12shio3.com/contents/files/32794691101.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/30326510498.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/88055111148.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/61285090501.pdfIn PDF document text
    • http://phukientubepxinh.info/gomsu/sanpham/anh/files/gojedojewetemubumetoxofa.pdfIn PDF document text
    • https://kamionosnyelvlecke.hu/userfiles/file/gunozir.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d281fd6b0e---nefiped.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/kafuri.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/77888194095.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/96106612975.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/tonopuze.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/44386890570.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/reluwimimuta.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/23415554925.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161308d998c0f1---93961611580.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/rinozuwiguwotofefegorojuz.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/89628775813.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/28775987621.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/58088110860.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/lisinomo.pdfIn PDF document text
    • http://roocenter.ru/upload/file/70823650968.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/84148511067.pdfIn PDF document text
    • http://nktrading.qa/file/files/93722370793.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/sipitutuxitef.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/satibagimilezaf.pdfIn PDF document text
    • https://ms1oke.com/contents/files/didemikimexojinurul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=experiment+z+mod+menu+apkPDF 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_off0000bd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD38 10676 bytes
SHA-256: 753ee5473a1652cbd79f55a64063a2f4a44782abfc92459ec588ae945b604d3b
font_01_sfnt_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 15188 bytes
SHA-256: 3f837df089cf942518cb8a088b97f66b7f62ca01aa5ed4f95a3b9f8e4a29ba7c
font_02_sfnt_off0000fbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1