Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e6001685e7fa9b…

MALICIOUS

PDF

70.8 KB Created: 2021-10-01 20:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 236bce80e6f251122a072006164718de SHA-1: 30c926dad4da5d1672e7145498f97ff2edca1625 SHA-256: 05e6001685e7fa9b49527828076161dc5cc21043fe3e6a8d72f5e66d81d5747a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=executive+support+system+software+example PDF link annotation
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/fabitadofafoxokaxir.pdfIn PDF document text
    • https://activepymes.com/pub/file/vufevupobulalizufe.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/1e99aca6f48c4d6cac4fb217a9e1d0f7/54223886724.pdfIn PDF document text
    • http://wenxuezj.com/images/File/3046929049.pdfIn PDF document text
    • http://strandedtattoo.info/file/5791789551.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/62446637672.pdfIn PDF document text
    • http://webcertain.asia/contentupload/fckeditorUploads/organization_/file/50257750755.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/49113020404.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/24651404910.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/2109221840300386365v68p8.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/tonuwoj.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/bogedelu.pdfIn PDF document text
    • http://cwesp.biz/upload/file/netufowovitebotemebe.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/dubuzororo.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149d97745741---74231720994.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/86133483664.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/68046666236.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/debameruk.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138cd52ed9fa---julovupomalajoriga.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/wijonuvudako.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/jepabum.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/92132183631.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/68523217550.pdfIn PDF document text
    • 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_off0000b188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB188 10988 bytes
SHA-256: cd33e82ddcf34dcd9da17717e7de7e8828e3fc203892017a2cc8a381ba3d00f1
font_01_sfnt_off0000cb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB39 16816 bytes
SHA-256: ff1e8e551af89914490f6e852eadcc0da5770907de4782b1ea5105dcef9e64a2
font_02_sfnt_off0000f5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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