Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8433d47c0506f56…

MALICIOUS

PDF

83.6 KB Created: 2021-09-13 00:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 82d520b581fc7d00f7434e60d32e1510 SHA-1: 96fd80fbcb4a59860607c3e07c52fb2d716daa07 SHA-256: d8433d47c0506f56015453787db1ba47a821a11b57a219918754d75be4b94fc5
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to malicious sites.

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://romanakladatelstvi.cz/userfiles/file/47923114749.pdf In PDF document text
    • http://medi-sen.com/files/files/82807260462.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/potipizozofowel.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/67057019350.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/8774380538.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/jadibulij.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1cee30417---30918222427.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/bakitaw.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/fipibomijabifuxabesa.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/41667636066.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16137c4efe3231---52959172181.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/18559203706.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/xetopupuriranag.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/96542798955.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/xidapufurip.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/54088741962.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/39583697123.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/49666142518.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/xonokepavokidefazonaxi.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/90996560350.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/73208950992.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/98255345008.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/vowukudufiretuwu.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/vulutefo.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/jipeseguriwikijenozam.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390eb7923fc---57032896452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=redmi+note+10+pro+pros+and+consPDF 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_off0000e0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CE 10848 bytes
SHA-256: fd853af80c81837416a66e632c6e2f22fc21807bea4c6f7194a9a061b2c76841
font_01_sfnt_off0000f9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 18036 bytes
SHA-256: d8dbf6ce8c374292ea4dc2c8c31faabad121338fa3bd7f705caf14f7dfdcd543
font_02_sfnt_off00012919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12919 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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