Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3ce829db96452c…

MALICIOUS

PDF

94.2 KB Created: 2021-09-05 22:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fbe5eb749f7ae3c9019decd0d44a12ed SHA-1: f67b9276f385f57e81634fdc8a3e771f5edb9b9f SHA-256: ae3ce829db96452c4b47b1c11ba7767fec58b72d6a608652fa548116d5a5919c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.1197

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
  • 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.
  • 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://philabc.ru/uplcv?utm_term=henryk+sienkiewicz+quo+vadis+pdf PDF link annotation
    • http://laihoawedding.com/app/webroot/upload/files/koludoxugejuxor.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161291e498bb59---69413952532.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/38874654281.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/171801283.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/f5d4d85f75890f3a2ce2ef580c52e48c/97621566522.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/guguziwu.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/56395560792.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/25704624291.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/dm2q21hji9akkg8gc35kt1dfu5/82753324510.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/161275254e24b4---39618476776.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8edab53be0---7869810151.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0626698001629396026.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/senav.pdfIn PDF document text
    • http://stepsforstarlight.com/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/32267404475.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/wivuv.pdfIn PDF document text
    • http://citra.cl/userfiles/file/dunurozizi.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/ed5lbr555hbaqplhb0bcd3g8hb/75776504451.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/filejav.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/solezugasotizixos.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/7726d0ad45fa9e444a3970c79f2b9797/19356251201.pdfIn PDF document text
    • https://littlelightnepal.org/userfiles/file/didalega.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/acce87b848ff2811e8a5848b7fa04074/13167237182.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c4a20cb3e098a50a09a533aa260f39cc/47368668599.pdfIn PDF document text
    • http://newo.ru/files/files/kibepelanosilofevobujip.pdfIn PDF document text
    • https://hgb.se/filer/file/fuzowigagepiwexutu.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/80851967846.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_off00012100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12100 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13917 11124 bytes
SHA-256: 1f62b12f699a6fcbb48041b7c90d4cfdd13a824dbd31e44bee6767701115b993