Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2301fb7096ff25…

MALICIOUS

PDF

70.3 KB Created: 2021-09-01 17:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: edb79f50468a840fad0eb279f5056e57 SHA-1: f8afae42e335a00b5a1e5b8b5b69f6fc2c0d162f SHA-256: 0d2301fb7096ff25b81983bf755b2b9efc8e58ccef4fff585292e0cba9c5fcf2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or to download further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7039

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://maraulsan.com/ckfinder/userfiles/files/bipisinudafeze.pdf In PDF document text
    • http://sklepjola.pl/userfiles/file/bedemojikonupubamet.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d53fd7970d---tolilakapibosidolejozis.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/3a4a4193b92044fce651de4c0a58122e/66803255505.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/31fc489d956b464fd632ef995dd91a42/53968700230.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a05ced16314---3658391090.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d6936846057a6da8bd66d00c1f369882/23719568635.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/9891595376.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/2b951879369b6564043d57a17b7f44b3/83650669072.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/jotenelu.pdfIn PDF document text
    • https://actorconseil.com/files/file/welurinurad.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/73218295792.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e82d048942---57023686709.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9d0f2b139---53451643119.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c319a8d390---fabagabalirumex.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/bajid.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/domotinojifemovoride.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16097b5c6bddb4---60069717262.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/vqk2801026ov43pqi75rrjb5mk/63762129689.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/34654904602.pdfIn PDF document text
    • http://polkovnik.su/upload/file/95178457107.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/masibutokisutapexeda.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/99311094982.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/85685870180.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc6311004f---99903116570.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097bb5f95f9a---6239183266.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/lr7705hepelhman0obaf0ep43g/nilotimimasipig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=enticing+british+shorthair+catteryPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 10700 bytes
SHA-256: 505615770e63d04b4789123209bcc785a2a0fcc0744725f4b67cefe64ab03e70