Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce5f74c6a9899ea…

MALICIOUS

PDF

62.3 KB Created: 2021-06-23 03:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 76500966de8c630572a29c701de0ddd3 SHA-1: 7379c81f84cfd8f5a41dce0156f5e1c503921d9e SHA-256: 5ce5f74c6a9899ea90ad2d910c71d95e30cdc82b6a60bd1e84f25ae637178621
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common tactic of luring users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b034a6ae4c7---xodebutomibor.pdf In PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/xunodabopugosajelubetulas.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/vobiwalimudatola.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c9ad981dffa3b842f6f237e6bb25c285/duzisutefiledowovabegob.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc2421e184---bepog.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/fofite.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b870a2488---vezokeduwudifenezip.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/65950158417.pdfIn PDF document text
    • http://paliukenas.lt/i/File/51654839510.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd36d4640b---16486293849.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162345852951.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wibojonuxufin.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/9ebfc6e3718ac8133dd1d82bd5394086/sitogas.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/238gci3k4q7buocjpa53tq7qo7/loxulaxebagefutuwexu.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/domamajejoso.pdfIn PDF document text
    • https://daismene.it/file/77837588764.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/kikojomo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ameritron+al80b+manualPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65A 5116 bytes
SHA-256: f797b5e36539b23511a204c31f07d5fff2de77cc4c7717346df4ac3a667ac082
font_01_sfnt_off0000c7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A0 11136 bytes
SHA-256: fdae6658c64db468f4d05bf225c2a89449530d7a9ac69216395a1b083b25e298