Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb752345817b896…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 00:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 01c71b0e084a25333b8bd297db2efd41 SHA-1: 13ec105b0b0e99122cf38167c1e46cf7e6d09cf0 SHA-256: 9eb752345817b896502a61e48917994f5ae7187123f86336c05a5bd69af13695
104 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple compromised websites and disposable hosting, indicating an attempt to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://allytemp.ru/uplcv?utm_term=classical+electromagnetism+in+a+nutshell PDF link annotation
    • https://aldwalia.com/userfiles/files/lexinepamurolir.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/47100470823.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/89697086114.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/lepebovofaxopaxofisewawid.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/wobopawosediwatubolupir.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/68647537398.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/banerepituwelokutanugejov.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/70155196682.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/gejelotilezifenemukaligi.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614265161f554---kupifodur.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161403af663b04---87599544144.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/53093813677.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/20099691723.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/73856062294.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/72363402474.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/duvanepemawipesipule.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139560d5b855---jemuxozukivefebes.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355f5a0416e---wizizopigofuwul.pdfIn PDF document text
    • http://cheliabinsk.realxenon.ru/uploads/files/bizivuwogurofud.pdfIn PDF document text
    • http://news-hk.net/uploadfile/file///lezefidusazogo.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/12000776664.pdfIn PDF document text
    • http://gestioniarmatoriali.it/25815573986.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137cf36526f3---55470252460.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/toxasuvewotilofutik.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/rawirezitapini.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/tagivefudaraze.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_off0000d0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C8 10808 bytes
SHA-256: 1cde706aff272ef689e620116e11c422fd62cb144a8f9e63c536bd07d46c354e
font_01_sfnt_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 18796 bytes
SHA-256: 132128567d418de506015c28d48a354d273cf77314194a7c2548e18d2194665c
font_02_sfnt_off00011a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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