Malicious PDF — malware analysis report

Static analysis result for SHA-256 96018a02ce094c8f…

MALICIOUS

PDF

69.3 KB Created: 2021-09-04 14:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b728e844401c373686fda17b84a9fec1 SHA-1: 4f2148a40e9d1eaf3734cf82dd56307f022e571b SHA-256: 96018a02ce094c8f1eeb27deb3cc888d74a26a74b5f2b9ab4f5b44d4b5119f25
72 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as a link farm. These links likely serve as a lure to download further malicious content, potentially exploiting vulnerabilities in PDF readers. The presence of embedded JavaScript suggests an attempt to execute malicious code directly from the PDF.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

Heuristics 5

  • 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://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc527a2f69---54238176108.pdf In PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/ln1iiupoo0cov5g8eepeafbth0/5815258908.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/falizote.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/fusew.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160788927dcf53---kafebawidozesawabalo.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/f6d0fd338af470cf758136a3c0860b5b/59612697705.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1a072b639---92080097257.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/22574081454.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/balabejiguwiwev.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/4a66b253426c70523eff55c6be6ca351/wosaxuwejegenovepelumoni.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/muzaruwukunafipogiduduwi.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c046ced9794---jabolikejuwigarejuvetufa.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb833eb108---vixotefovozuxeva.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/radijuvedakafibedizidefe.pdfIn PDF document text
    • http://hueide.com/upload/files/muzikepetokuwegijim.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/dibubagovirowotuxone.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/9fcb57cf97abbeda1ab675b50423ea10/45022840905.pdfIn PDF document text
    • http://ndt-ultratech.com/files/66526387285.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8a85cfdaf---xoxumivarig.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/famikamusefewuzowulo.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/ridat.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/97517654841.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/difize.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/3dkkflcou3ug2eo5dkgeh4issg/bubawuliwigomumutifimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=semi+block+style+letter+format+pdfPDF link annotation
    • 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_off0000e0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 11096 bytes
SHA-256: 50f19fb73984d6c2b5ad74c1fd54adb94491f5722ee93453c3fc918b81ba604b
font_01_sfnt_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1