Malicious PDF — malware analysis report

Static analysis result for SHA-256 444e0b9deb1a3525…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 02:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: da305b45a15f66ba5a18ad9e7f6fb69e SHA-1: ae8a5783d12c68a93d81e52d4399abeb123a20f0 SHA-256: 444e0b9deb1a3525f47fcecb573ddfcb93865edb426d2724eca92b1b18369cc5
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains. This structure is indicative of a phishing or malware distribution campaign, aiming to lure users to malicious sites. The ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4578

Heuristics 5

  • 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
  • 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://chinhsuasolieu.com/media/files/ridodanojidofiduzivazif.pdf In PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/b55fe9dae71fe9d0800cc2016f178d7f/wimuwizegutuwovetemo.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/rilufuropowegamelew.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/pukefa.pdfIn PDF document text
    • https://yodobashi-church.com/11581842335.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ivhf6mlch6mqjuqkbneab6fg0d/nosoxozinotipawosasebofu.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fb46c09e669---18333436845.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/a3b78c467d829c3948261af074c2a4cb/vazoranavolune.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/a06f7ae055d483a5c28a2b675e09b9ff/74070811206.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/35234229502.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/0005ae786d0c4386fe868d3c865fa655/tezar.pdfIn PDF document text
    • http://cmtsport.com/pliki/voxinajozabaxuxun.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/lukekemeze.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/87954562506.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858a0e9d760---47513122939.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bd95a5e6574---8085646217.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/jakipede.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/eppcd25iv5trlplkqrnptf33gu/91385315047.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/nofupuwenan.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/4702e49bb8dadf38802015869b8b342e/tisekuribemasok.pdfIn PDF document text
    • http://wdnederland.nl/file/56563306661.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf63ca00a27---37443404245.pdfIn PDF document text
    • http://boldogelet.hu/media/serekakabisejizisinosib.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/98849519963.pdfIn PDF document text
    • https://fallsplat.se/file/wukob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=parties+involved+in+construction+project+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 10908 bytes
SHA-256: cf79585286103958ae34538a6d4a32681b8179d6d85d309a19018f981e36ccbf
font_01_sfnt_off0001093f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 17196 bytes
SHA-256: ffa22ccfed56854d0c881e37fc59f74ddc4d43098ff6117c7c4756a4cb7a8f62