Malicious PDF — malware analysis report

Static analysis result for SHA-256 20eedfbf1b309e56…

MALICIOUS

PDF

97.6 KB Created: 2021-09-02 16:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1722a772edeb28979634e20d75afc68a SHA-1: 01caf2325daa5d5d0c24be72e0e90d4be7cc5904 SHA-256: 20eedfbf1b309e56f0fbba3c078149a1a9eb462442979a442ec58997593735be
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure itself appears to be a lure, with the document body being unreadable binary data, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aeronautike.com/userfiles/file/kefixefexasofopenadumix.pdf In PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cf44c6830---32180193443.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9b112ffb2---xivegiwedu.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/30493111986.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/71026706001.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/muzujukevuvivuwagigafe.pdfIn PDF document text
    • http://teknis.it/userfiles/files/60058042999.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/63hh49efbtr64dpsme4a9mnei5/mojonixogobelame.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/63707611850.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/71630830679.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/vivikajunijo.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ea0155c69---zibebimipob.pdfIn PDF document text
    • https://isleo.com/i_photos/file/2243421377.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc7412e186---39505595620.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/34218039348.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/161217ba5c2d9e---82091231831.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/dugifovijulizun.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae70d7f17c4---48338869034.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b3a84ecd6---bizelijis.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/94893430851.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f7cdff6e11a95463e14f1aa53b35257d/piwekegitijubiwavelejopi.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210811010942.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/kenenevafatafodebidepi.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/jepufuma.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/6c750326d23e26b13f10c180eba2919b/ruzereruwozekamezonegep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ontogenia+y+filogenia+del+sistema+inmune+pdfPDF 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_off000116f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0E 10980 bytes
SHA-256: d450e63a1144ab2688841c67788406a46824b4e992e5e37f8dadfe588cb29cd6
font_02_sfnt_off00014868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14868 18560 bytes
SHA-256: 36902f76fd965a927fb80589ee3911377f4ecf9ab1735ff6ad7696bcae64054f

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