Malicious PDF — malware analysis report

Static analysis result for SHA-256 184455b4117ff0ce…

MALICIOUS

PDF

74.9 KB Created: 2021-09-24 02:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bb294d985b1977527c82aecc6aa7f7f8 SHA-1: 311b14bb6990180b9f1c3904448c220073dc0a00 SHA-256: 184455b4117ff0ceab21ad1373ff3292f55b8e2dcb929dfe803ab9e13dcc191f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, suggesting a redirection scheme to malicious sites. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly support a phishing or scamming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

Heuristics 4

  • 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
  • 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://nomylo.ru/uplcv?utm_term=laxmi+bomb+full+movie+free PDF link annotation
    • https://unovosti.tv/ckfinder/userfiles/files/namoledegegexisab.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/63392256827.pdfIn PDF document text
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/geropadi.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/13982933163.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/falewo.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/nubogixaveziparu.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/42289734744.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/86606179450.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/walagekasutufoxijoxa.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/1025711699.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/63992992045.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/sajatamixededizenalote.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/jopeg.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/12588357863.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/viloxitolopewurumu.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/firarenuronojixijotem.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/14808424708.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/vutuj.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/72683746708.pdfIn PDF document text
    • http://sudeoksa.net/userfiles/file/20210911070734.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16140380df1658---36546080875.pdfIn PDF document text
    • http://thaifilmind.com/upload/files/5453848659.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/85179002.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efcc2d19e9---tibeluwafegewi.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/limunarijukuwamusofed.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/limuriguwi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 20276 bytes
SHA-256: 8ff2229b10b7f9171ecd7ba2f0def68076428d19bf44bf6834c0aab0d6fa8be0
font_01_sfnt_off0001111e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1