Malicious PDF — malware analysis report

Static analysis result for SHA-256 1134cc0c5242c545…

MALICIOUS

PDF

84.4 KB Created: 2021-07-02 11:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8daa7cbb770cb08fe0b23302837646aa SHA-1: 49524fca4e564447f903da58538b199f31aec2d1 SHA-256: 1134cc0c5242c545a60160333325c2361d694977d76ea59917642186a355da5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://anhbanglaw.com/userfiles/file/viramegamij.pdf In PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc301a1a085---97148451064.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/90530974479.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/6190469000.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/muwawefekawawafadaveg.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/71b5f15e64460c0b1e317e732b9b98f8/wimimagatemuni.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/bunelusokigijodadu.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/4o0j4des47m4i1a2qfdcnp6c7n/57958476717.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16087b4792d760---27826511225.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/27214387151.pdfIn PDF document text
    • http://planetamama.ru/files/file/dodanusebapixugovenaxa.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/9kds0ggo8nolv5rcj5dq0e5644/beweritagaminuvavok.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/bozir.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/mobenarozixenegetumu.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160827d5e00eac---92482185192.pdfIn PDF document text
    • http://plastikacz.cz/soubory/files/vomisi.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/782bb6a452757b12ef12d0114f54a356/46201639675.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/8199c00894488e51003871a379cbd424/girenokujipef.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b821420e168---42301965081.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc360beea7---vabokiwepipesakamunu.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607458633f53c---80939713025.pdfIn PDF document text
    • https://room12shio4.com/contents//files/pizabukuwasemomemubonuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=age+height+and+weight+chart+in+kgPDF 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_off0000e869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 17048 bytes
SHA-256: 388442877cbb4df346731681d2deb923d54f65ebb3c1b3bfebc1dcd27e1241a1
font_01_sfnt_off000114e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFE 10472 bytes
SHA-256: 34d5a118afcf18c059af5d779529981e596a813c406d4407a1d25f64fe9f4ccf