Malicious PDF — malware analysis report

Static analysis result for SHA-256 9434186083faaeca…

MALICIOUS

PDF

77.1 KB Created: 2021-06-27 05:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b899f97a12edfbc78b98ea7ef131525c SHA-1: 071892418d1da10e964aaa4b4cb9b27af7bd4740 SHA-256: 9434186083faaeca30648c7640800ec07ed3577a7d8d68a452d921fc840a71d0
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or social engineering attack, specifically a remote-support tool lure. The presence of numerous links to potentially compromised or disposable hosting sites, coupled with a high ML classifier score and ClamAV detection, strongly suggests malicious intent. While no scripts were directly extracted, the document's structure and heuristic firings indicate it is designed to trick the user into installing or interacting with remote support software, which could be used to deliver further payloads or gain unauthorized access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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
  • 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 http://longarmacademy.net/fckeditor/userfiles/file/xalafi.pdf In PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/de29189f35d3b8b4a0f77e39cb2c120b/zefajetomogejelewujazunuw.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/885889394df6ac2b72b0cd43d8b98845/vigir.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/93801987889.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/fotadaferojejivajar.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/794a086ef2db1a2baaaccec4c9715e46/gugugibem.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/megukonedunabelusu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609894eabc4df---xoriv.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a4306bc59---daxolakufu.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd38be3da5ebea2a9a377c033f2b7760/74831031178.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/tufupepelejigofizosotelor.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/a217957a45c81950ddca77a65e2067f3/27110523413.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160923be8c5140---solezimekikefabawometelos.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/96dabaf4b2dc1bb7dc947a7fe1cd2b38/pevisop.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/1jk6s2pgg35r858kctn06v6iul/kasataxajufaloxo.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/kemapodunizoraz.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/488d978c909bfc08c0d42851a220f1c1/92492372726.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609be65114a80---89149846810.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c010fe72bd---vegotezijojokotiradilubes.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/86734910522.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73b9f66f3b---60268330458.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/68988527027.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac6f2cae1b---lepajekigopabigava.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/88534039611.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0eaa3913ea---susug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=thinking+in+java+4th+edition+pdf+free+downloadPDF 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_off0000c8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F0 11024 bytes
SHA-256: 9773bfa37abfd80c9cd67921741a3675bfdb99997f90ce2b33f1784647a23326
font_01_sfnt_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 16892 bytes
SHA-256: 9519c7fe998eb85b82016eff9ed4d0776cd77023ff0050d40cfafe0e0057ddda
font_02_sfnt_off00010ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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