Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eda1838434de1ed…

MALICIOUS

PDF

81.4 KB Created: 2021-09-11 09:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 952de60368c3da91d9a5d2475c2487ed SHA-1: c72ca6304df1e68cfd549fd178de01aaba7d51c5 SHA-256: 6eda1838434de1ed54e867921738a6959c6d3a39e843358b36510c977317a1eb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which are hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to facilitate the redirection to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://jl-vacuum.com/upload/files/51153758320.pdf In PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/82708738.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/saxugexovifakifimafu.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/tojalagevuka.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/30145424302.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/71010050545.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/fizuminozexike.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/lubanutako.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/wapugeveturebefunip.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/38328885968.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/22562032125.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/fanuluvugedipofeloxazuk.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/ruzuzabiza.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/bkjk7u7o75e3kalnl3eijhen0t/vamodojadig.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/63716129576.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/webefade.pdfIn PDF document text
    • https://kawanmto.info/contents/files/renumoxu.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/49922377272.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/bajazuzajewawepupes.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/84095684836.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/xajaze.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021090715590673499.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/68244581066.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a2fdb8933---zufetevowuzujomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+add+outlook+calendar+on+androidPDF 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_off0000d6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 19124 bytes
SHA-256: 518c43212a756d01b208b06139bb4dfee0ccc76e82c63e430d60cf30a486f4e9
font_02_sfnt_off00012084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12084 10464 bytes
SHA-256: d1ecbbaf00c225da912c2a0875345b9fe3269ad26cdf2ee27b2abe9e7d46d4dd