Malicious PDF — malware analysis report

Static analysis result for SHA-256 090c963f8b1d0a22…

MALICIOUS

PDF

79.5 KB Created: 2021-09-04 03:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d0ca773ad16aa898c8820c5124129bd3 SHA-1: 00bb9503eda804a922771ec41042ca3d44fb8308 SHA-256: 090c963f8b1d0a22e88cf5151187063eb077c7615b39b1d93dcb37fc99ea38af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to distribute further malicious content. The presence of external URIs and the nature of the links indicate an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://mahae.hu/files/files/16227589497.pdf In PDF document text
    • http://hagelkonzept.de/userfiles/file/54612829261.pdfIn PDF document text
    • https://artenika.pl/fck/file/zisoji.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/nuwifevol.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/xalefoxotev.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/kokewe.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/fumifuvavogomuduwetave.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/1dde48d8787fb8e1b3609cf1334dfdf9/38468286057.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/e2dcaaf6b20c72e77fbe6844a5f47d3b/kanarokopaj.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/xexugikodekeki.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/92bd6338e83bdc036c9a9122e8e5005f/vukitezikovuxufogel.pdfIn PDF document text
    • http://rahwayhigh.com/clients/42761/File/fefunorixosuw.pdfIn PDF document text
    • https://dineflon.com//files/gamodovutevelowe.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/zinogesosenagojabekujuf.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/19841511926.pdfIn PDF document text
    • https://niagarablock.com/application/webroot/userfiles/file/5742149801.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210606034207.pdfIn PDF document text
    • https://gentrilieu.vn/userfiles/file/tenoraxaketewup.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/52717665998.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcefb85c23a---95293221278.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/ecfecce5bfd83344fdf7fa265fb88ef7/9397200102.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/38752306113.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/50123806720.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=charlotte+bronte+villette+pdf+downloadPDF 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_off0000c8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E1 10752 bytes
SHA-256: 5c88694c634d0e0866323630bf2a86c0968ebfef9dee9cd5d71c653f8b648b53
font_02_sfnt_off0000f95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 20636 bytes
SHA-256: 76728be34a4302c7ed727355e27ccfcc367743fb83dc262f3a373c0387e740e9