Malicious PDF — malware analysis report

Static analysis result for SHA-256 3339540296d5d751…

MALICIOUS

PDF

79.8 KB Created: 2021-09-13 17:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: efa03443ad69bde30e8df3f8b9ca5f08 SHA-1: b8e64501e447dc3f522f53d5bc55e3eec7d39b60 SHA-256: 3339540296d5d7510ccc96b6ec2d9ae3d42692f0f6df77bb803efd89648f76e7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://smidgel.ru/uplcv?utm_term=new+shadow+vip+app+download PDF link annotation
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/80845407844.pdfIn PDF document text
    • https://telorgabus.com/contents/files/verovipesase.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/kitezovip.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/pofavakuseronelovetaropi.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/29122542033.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddae34b7f9---mefobu.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/fifala.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/23314205316.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/74096534283.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/pijaz.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/73036808271.pdfIn PDF document text
    • http://195exim.com/datas/files/29832944742.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/revizi.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/wifidozodadasolafusig.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/dozugawegojekekol.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/sabirake.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/vipewagijikivawif.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/53158623465.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/dokevozoriganegevome.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/91646098395.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/92729008749.pdfIn PDF document text
    • http://www.phuongdonggolf.vn/app/webroot/uploads/files/bijonak.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/1846876900613981157f7e6.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/20708848006.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/refufafiz.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_off0000d4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 10420 bytes
SHA-256: 2998c4e78f8b77cb77fa985110d338381ceab56d3bb3bf73ac3575e2322629cb
font_02_sfnt_off00010472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10472 17648 bytes
SHA-256: 2962a2b061b6ef311962ba6a27c6c9a6845b0b8a1aba759db28bfbd399d91097

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