Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab33450cb5d990c3…

MALICIOUS

PDF

72.3 KB Created: 2021-09-09 08:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6f344b1b619e8cc2cc72a8a45f95de9b SHA-1: fce70acf7c68f55094df54ece60bb102a0f4bee7 SHA-256: ab33450cb5d990c3c6fb41cad15e640a5fb37578877e4c30aa6d6bdf12a801f2
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to obscure the true destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users through multiple, potentially untrusted, domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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 http://www.itidharamshala.in/images/uploads/files/14705334017.pdf In PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210903_CBAC164D2C8B979E.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/93595175624.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/papixetobutesatigotunife.pdfIn PDF document text
    • http://rinsacars.com/files/others/rekatepuxerexeb.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/3438303652.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/xivipawirivapemibifamuzul.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133a5970eca7---sojurixekuzixuzawaz.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/30764457936.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/69631503279.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/58224294059.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/11092992547.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/50509876443.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/28091971996.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/kugozojomufazowanari.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/kuziku.pdfIn PDF document text
    • https://shidoremicrosys.com/media/15331747818.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/31567685186.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/weperejuripumogikitu.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c729403c3102a73f29b185951d9246d3/57437365457.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/rodexuvifapetolule.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/pamedis.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/30979449289.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/50307944296.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/xudawunudanuwukiwotavajas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=real+cricket+20+game+download+for+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_off0000b904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB904 11116 bytes
SHA-256: 5f97fa490e6fcc2c1eb61b633ba66fe1edc3690325f23c8960e4719188bc763a
font_01_sfnt_off0000d2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 15812 bytes
SHA-256: e847c3641606a7c54d4e28e194f91b4ee52c32d7009746d12f6a6f6b11b40bff