Malicious PDF — malware analysis report

Static analysis result for SHA-256 989db0e5bb80b42e…

MALICIOUS

PDF

136.0 KB Created: 2021-10-05 10:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ee9a297805fa1622146d24f84f5b6811 SHA-1: 6b0cb26a79875ae538b95c6dcd3dea919fb7b358 SHA-256: 989db0e5bb80b42efcfc93583cbbbb6cf312bedd184b18401b1b37b22524b866
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable domains, indicating a phishing or malicious content distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document is designed to host a large number of links on low-reputation domains, likely for SEO poisoning or to distribute malware. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7639

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.
  • 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
  • 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=chak+de+india+movie+free+download+for+mobile PDF link annotation
    • http://tvcsoltau.de/userfiles/file/rotijazajewusikibimu.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/85799436005.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pabavilavige.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/gevusivexodegerokeni.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/12737656739.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fada1d214f---kajiredavubebotakivekana.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/52004454610.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/lebotajanefegu.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/91546272092.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/87766224497.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/refofabivasabamakur.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/29899486368.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146189c670a0---lenerarekijusepubate.pdfIn PDF document text
    • http://www.ezmoving.com/file/38655537087.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/9864094451.pdfIn PDF document text
    • https://gulamanis.com/contents/files/netonegugod.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/22736432973.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/xisew.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/97436854722.pdfIn PDF document text
    • http://e-store-sys.com/userfiles/file/botekus.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210921153446_21wl3s.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/nuvegugezowavafewidu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC97 10768 bytes
SHA-256: b9494fc71529fca0acc182459801cb9e11a7b49f2f9ba16e99105a0890ddd23c

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