Malicious PDF — malware analysis report

Static analysis result for SHA-256 29517087f7cc194a…

MALICIOUS

PDF

87.4 KB Created: 2021-08-21 04:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4ca73b668439ccb290d8f1aa58171fec SHA-1: 0101edaf7617a81e95da5d04d67e1b97d6d56e30 SHA-256: 29517087f7cc194a707de0b4aef23e32b330038c905d60c65d9d8c9c1223293c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristic firings point towards a phishing lure, likely attempting to trick users into downloading further malware or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7778

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6360089ab---83230672833.pdf In PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852805d7b5a---miser.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608d114371198---40740570108.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/0c93eab8c0b956560fe6325680bf4c1c/4227357316.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16120327d45264---69115013882.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/2d8d3c89559b5574f0d552200adbdeb4/jisozuxevet.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202108091118459879.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/1b5f527b14a4047174930e25ef05d1db/komegumijunufekofufuxik.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1mtbj8utkejb79h6ha96i1kaf1/63991825031.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3a2554109---vazigixinevetedadapaxuwax.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a4087197b---rosadatinijumuxeketikera.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/161083cb65b145---71064472624.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///52545296178.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/tejilisoz.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/lesezazovobomolo.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/23805555001.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086da4d70eb3---lujodolejedo.pdfIn PDF document text
    • http://clase86marista.com/clients/25276/File/gawitadam.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/notomu.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f014b88633a---18538977871.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/51385157654.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/vagepebomuxo.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10e2f1bb12---sasalalewebako.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/sutekamava.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=adobe+reader+pdf+editor+free+download+full+versionPDF link annotation
    • 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_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 16940 bytes
SHA-256: 72e7b129950415248d9c11fa79b9ae32a511942194b15aafd17df6d726cb4118
font_01_sfnt_off00012eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000146d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D0 10864 bytes
SHA-256: c16e629b369f694d7d3d6af7680a08475dda4b982df2f0761948dea42fa23cd9

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