Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e83a0f9ea89e1b…

MALICIOUS

PDF

79.8 KB Created: 2021-09-03 12:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 71af4af1b23f68f2d4d17c9dcb357de5 SHA-1: b59bb292252c8168952eef55ac55633c768393b3 SHA-256: e1e83a0f9ea89e1bc54c8f7e03b53ff73948d0b44e94eb87596e4e2c8ae50660
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript suggests it may be used to further obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/31f5dd6ad26a56ae80bbb92af91107bf/gajiwinokonakalevizadejav.pdf In PDF document text
    • http://pechati-piter.ru/userfiles/file/pipodotidalos.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/49176021356.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a017b87de85---99629054570.pdfIn PDF document text
    • https://aashianarealty.com/file/tedefo.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/xabarivipida.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/37732148931.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/4fa30464f77e32408aae93f9039ee9ff/11846246457.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/salejixozibebalomozug.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/18959949838.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/9720550700.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/vimijusi.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/7160255454.pdfIn PDF document text
    • http://klenderbio.com/upload/files/89101853593.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b477a7480f9---rebimemizaxikakim.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/xalegumiziripotumobevit.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/79267133793.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fe384edb7d5---85952484475.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/98801814959.pdfIn PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/25376383391.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rv8ctrqpotduch2lj61h3j6ca7/29574131051.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/menasigijiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=download+pdf+from+link+swiftPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000d4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AC 10704 bytes
SHA-256: d63e087d37bdfd389fbb401557cda386fcca44cf7292ad97964bf0c48d3ac29a
font_01_sfnt_off0000ed37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED37 17052 bytes
SHA-256: 2d342c6295900078cac9c47c096e328e18390abc8e8f07956274ffbfc68e39c1
font_02_sfnt_off000119a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.