Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7270177b01d214b…

MALICIOUS

PDF

76.1 KB Created: 2021-08-25 15:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 51eb85fbc8c08ae1b1cd7f922843d489 SHA-1: 83acd469d3098d7e0382f2d0ebbbcd8aa0471d85 SHA-256: b7270177b01d214be6d0268d2769f886efed1a2ae96e7f71ba3108109a6dddb0
164 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. Heuristics indicate that the PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to obscure the final malicious destination. 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 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 http://childconnect.com/swi/fckfiles//file/59782230378.pdf In PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/87c5c3da1e715bec6b38f54312c9174d/nadukaxexupozagixu.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba01af28ce3---77522492404.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094cd27bad4f---81375445592.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/garek.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/48044785184.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/nunejikasalavilokixonimab.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f49fe30c77---78334051487.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/52773941227.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/zazodex.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/jigipif.pdfIn PDF document text
    • https://hirurgija.me//files/givutap.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/87616143940.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/99999325216.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/nonotofajobifukalugasexi.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/79678024468.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/dezokudotumuluwepikip.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/lipelivut.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/nunigatane.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/98c6c70342d05d6ada64020bcaee0a88/7167970940.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/nitepilukuzenesogoxes.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dhqfjgts9u4jnchouiu86a5jd7/92218074924.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/milivibofoginibazeg.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/7e11f7313be6b834fd8798662e353df2/donejizemasurisikil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=best+employment+lawyersPDF 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_off0000c6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FF 10572 bytes
SHA-256: 8566c07ffbca33245020a4e39ff980ad63ee957fae23e151c1f3f002fc04e551
font_01_sfnt_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 16952 bytes
SHA-256: 455489155d76a3449fec7bdfecedb0fb14ff0199cbe03199c53b64cd35857bb0

Open this report in the interactive analyzer, or submit your own file for analysis.