Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b081688bb404899…

MALICIOUS

PDF

70.3 KB Created: 2021-09-13 04:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 00d32f393713425d752d49762833c071 SHA-1: 69a98f87cea717116b7a25dc0562e0ad9dac22df SHA-256: 1b081688bb404899b190784200611d87adee2a6152fe540597cc869015ffd558
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. No scripts were extracted, but the embedded URLs and link farm structure strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6930

Heuristics 4

  • 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.
  • 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 http://dulichtantai.com/files/uploaded/files/6809753158.pdf In PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/wometevi.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/milaxelanefe.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/613e6cf00e450.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/51916228867.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/nivesivegozurakomutotij.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/gulufunop.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/79378798129.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/rotidozevijadip.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/gijigop.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/xasuviwulepirudozudife.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/fozebiwubadaxot.pdfIn PDF document text
    • https://businesslife.com/content/file/58886782380.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/vunevepimo.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/72573871554.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/23068599389.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/47859358758.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/11306179692.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16130a64c75289---mezogafagegedafomulat.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/86169383560.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/gipawaxomos.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/86220077546.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/19595203578.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/31522792443.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/0940ac6bbdfe3af7727dacd773877c11/sewagesakuwenuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+foreigner+full+movie+onlinePDF link annotation
    • 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_off0000d71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71F 10360 bytes
SHA-256: e61a6aa07b5de287a8661861662db21ee6539055581bbaedbaee00b8e354049b
font_01_sfnt_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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