Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e58295722a580ea…

MALICIOUS

PDF

88.5 KB Created: 2021-07-03 02:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b63b6dc52a5db7828fcdd68d30a2847e SHA-1: 1bd6d63db3e95a80e1f292debd53ccc3ae6337db SHA-256: 0e58295722a580eaef9ab74fb3b08811928b5d73a8eb654ca5bb73af800c173e
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution. The file's structure and URL patterns are consistent with a malicious PDF designed to lure victims to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/3f861be63b340fc405d953cd69fde788/pobabokurutej.pdf In PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/p765ldu3qfklkjldiier0dl5hq/femog.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/63811703141.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607d51651587d---34398968319.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/3cdd55725f49b191286eac20493aabba/fewamejerenuxev.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/vupesulo.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f702bc517f---20310066163.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/7rghkou3ksvk89kocvpebe665r/30359374185.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/2467618326.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c090f967f64---taromoz.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0e7f349f6---difasokimokonite.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/tigakubedojowometagaf.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/78420128185.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/de5ce9233c49ecce9f4d364b13dec398/53410683006.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084241ed57c5---felunajupixudilo.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/vedefuwitewedetuvimon.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/22bd0f564b327e3afc48f10992287e12/laroxupovalewubomotatuf.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-06-27-16-19-40-QaLYl5iy.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160897931cd22a---lepewopax.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/7117261603.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be3f9646df5---32553721186.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e02521c09---32886176006.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/16554639741.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/6fge0hb4027h71jpdfeai93bh3/zixikokojefenaxe.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/zizusavuzafanozosisaduzal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=driving+miles+between+two+addressesPDF 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_off0000f635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF635 10884 bytes
SHA-256: cca1b78d007a953f96d49c32cf30acb759857f068e02bdcc8e64d37e3133c92d
font_01_sfnt_off00010f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 17408 bytes
SHA-256: 14cd19dfb65730d0145632186406e8b6332b0aa106b66b343bf07ba99e11c97d
font_02_sfnt_off00013cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1