Malicious PDF — malware analysis report

Static analysis result for SHA-256 da36c75c6bdf3651…

MALICIOUS

PDF

90.5 KB Created: 2021-09-24 06:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 13a015c0c2de210499f7559249b7ff27 SHA-1: 60e79cfe8b621b7fa1d1e42cd8bb55ce1303fde5 SHA-256: da36c75c6bdf3651f7fec1d78823dc0b221ef23fe259df86b4f705f5f3f6e728
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, aligning with the 'Spearphishing Attachment' technique. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://chcial.ru/uplcv?utm_term=super+mario+bros+2+ds+download PDF link annotation
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/92795027874.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/kukeberezobozo.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/c9b3771b76b0ae17896bc2b6d29c1002/juvofipigolu.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/gedomazobejuwufej.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/45684544430.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/52110627627.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/3dd363d61b7590689249d6df1106cfd5/62569864265.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///bubetoxafurixun.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/66280cc8d6ead3abb0b916653ad0c88e/pibavopabozinekitemet.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/11990262149.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/jinevoxatiwevoredo.pdfIn PDF document text
    • https://motecx.com/images/file/xojuzowigal.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16149e877deaf0---bavokulajezotuvidoburuv.pdfIn PDF document text
    • https://finliz.lt/i/File/kojaxekokokuvam.pdfIn PDF document text
    • http://volamthienha.top/userfiles/file/zuramimuzef.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/73555355387.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/3299902486.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/fuvuwisifurumirofazudoli.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/kevozatifobaxawajitati.pdfIn PDF document text
    • http://lasermedia.cn/userfiles/file/dijenebalowivepimaxug.pdfIn PDF document text
    • http://unseretochter.ch/images/file/43109154786.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45255342053.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/46082100299.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/kuwulujajufurusuzipema.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/xewijovumodotovip.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_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CE 10976 bytes
SHA-256: cf2f317cbaed8f5427d9a564193e341253515e922bac2fd9e7d63b4c9c5ed3c7
font_02_sfnt_off00012d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0F 17968 bytes
SHA-256: 21a766e22df9536b67d525ebb3955b4c8da2b785a4cf00a5fdf2ec5dc897d28d

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