Malicious PDF — malware analysis report

Static analysis result for SHA-256 480565e7dda13bd1…

MALICIOUS

PDF

67.9 KB Created: 2021-09-26 23:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: dafd3c31fd2f4b91fd5bf1693bb59ffe SHA-1: 57fcc072528806931bc9a1dce3edaa6f1abe3f73 SHA-256: 480565e7dda13bd1743c4fb57a97ae62508ff9fc85ce7c670f9c2fbdadb0273b
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to various external URLs, many of which host other PDF files. This is a common technique for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pistant.ru/uplcv?utm_term=latest+mix+2020+mp3+download PDF link annotation
    • https://sogelec-eng.com/files/ckfinder/files/14066878750.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/24563395353.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f61df00bbf---suwamurer.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/dulemo.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/75153559687.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/rozogolevebedor.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/8q49tjlhct3upn6fo1p11fdtc7/zidudunobenoz.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/10915939204.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/72bd15e32527c39ddb93bf2a8ea801fa/funuxufobumunen.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/83044665604.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/mujegiluziburimizapunapif.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/fasamubasixuwe.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/komarokoxobivesik.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/wuxemeruwijawalobukewiba.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/29222620513.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xesutaveteveg.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jividunumoxaxew.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/416c5ba7b57fab420381162ce6595a1c/vewezebabalaminarapolatog.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/86791493163.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/vorosamu.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/zokitisodezeti.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_off0000ac4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC463 11012 bytes
SHA-256: cc019838747f2bc2ad73be676e29e9e2b2131b332f8254c39e0f296d19057b79
font_02_sfnt_off0000de11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE11 14496 bytes
SHA-256: 0325da81e0b5ef9b499e9fe9d53d165638bfb926e9ea75cfc8ad02568983aa9f