Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d46450ba0a9a5b0…

MALICIOUS

PDF

123.4 KB Created: 2021-06-26 07:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c1fcf447d91aadae99ee52db9aa62ddb SHA-1: b7871bea9fd1fb24079b0101d96fc8252359382c SHA-256: 3d46450ba0a9a5b0373ac6ca774f1ba38bbb3e7faea2d29a953e585de509e9c9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3126

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://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/o3g0n45ua7ul86epp62oamn7la/18353011894.pdf In PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/fv8fu9a39fonglde0oe9fskke3/faxoxosujitopixifodogex.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/veturosiguziwatadifiwopov.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/56458657263.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160942e8b2eb5b---66682879564.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090499a5a239---73934897175.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be71fc66802---muzajogemawixozodat.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/63937384728.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988cdbbf412---98737122763.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9472f79cea---94086080863.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc109271a---22669649515.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/kimosagabixadut.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/46416212556.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/88358732041.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/mafibiwininikuru.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed3af4fd1a---mulapajulawisapa.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9c2b0b7e4603ff3ac5c4740222855ce9/zunaliraxakubumuto.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c96d4fadc35---joxidufewisu.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/fc6aa6b83bae4f9782078cf1b7acafeb/mikerove.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/lelaxagitugogumetepanuzo.pdfIn PDF document text
    • https://stvorki.ru/files/file/wudifokefexudi.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/057de41209d86264e270940a4482c07a/61720313717.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vqcpvaa9qfm433tkpdkc6eqvj1/bedapa.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/aho54uguigv82dh6dhm1vtpro1/buwexenizidaruz.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/2630836288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=cannot+copy+text+from+pdf+strange+charactersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF1 22076 bytes
SHA-256: 1b1458a989ba6099dee1022500a2add5fb96a26670d8e2518a89c5b71f52ac3a
font_01_sfnt_off000170fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170FC 9088 bytes
SHA-256: ab5bb3ccbd70e4ecdd65f1ef9877ae22d686451fcb3dc3a8964deb3b730a8dd7
font_02_sfnt_off000183c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BDA 11176 bytes
SHA-256: 3625800a0740f95b0612a208096688c9becedefac47ac9cdf5527654b5de9164

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