Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5364fd8c2dff8a2…

MALICIOUS

PDF

155.5 KB Created: 2021-07-13 21:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2d313279e56399539d3e08a4315f88a7 SHA-1: 92c31003b989c4b06d1c87d5caedb5cb56db78e6 SHA-256: a5364fd8c2dff8a270a162909535d17e5452b33f08ef9b7342a12196144e13e9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with the signature Pdf.Phishing.Trojan. The PDF contains a link farm pointing to multiple compromised WordPress sites, which host further PDF files. These links are likely intended to redirect users to phishing pages or download additional malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3078

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 https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4195dafd41---65209609444.pdf In PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/bcab13f1f42889cd8dce84ed27a35975/17881863595.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/tejixarisigikikomut.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608a037d6baa0---tabekomemawelusufijesore.pdfIn PDF document text
    • https://digireg.com/upload/kexapop.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/bivokupanulufug.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/851622e971def37325d0a28cd0448761/72460100414.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/64069627393.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/al0en8g7mcuhrufilttp9k8cfs/jiposuziguvojemo.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d093926e95a---42276738954.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/77454399404.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe4ff27b375afffb4bc9a9f6724fbfdd/goxusozemu.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/k5an2m0u5kgo02pciada4r1m7s/83553310127.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/3bijclfljvfcqeba8miui9o8k7/48263906141.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/51978644698.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/oeruagdb4vvg8kh9hbahlattd9/21064402250.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b627a64be24---85150962411.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160add701289b4---31133910159.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/jabete.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/76302853179.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/6f1cf83a0ba21f17de17e628912d21a1/39991354295.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084922ab4323---54843624490.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/vcmu43a5ee8gdqegp0qsmpcmif/navibogobasemoz.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b45092ec41f---85202766178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=made+in+abyss+2+season+release+datePDF 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_off0001a4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001bce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCE3 49856 bytes
SHA-256: ec7b0d3d625ad5011cdc773987d87ce313490963b1f26a4b57a432376f7b8b8b
font_02_sfnt_off000243dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243DD 18280 bytes
SHA-256: 00ad6b18b5b2e14547a5b821b73cf1fdb3b050ed4f2bcf11f2192be24ea61489