Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c25fb567b763182…

MALICIOUS

PDF

68.3 KB Created: 2021-09-09 04:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 50712b44b996c4e5bdb42e1a1c2ef7be SHA-1: 17df9b568091b7f4478583c1cae3f5f8d3cf17ed SHA-256: 0c25fb567b76318263ef0de1dbb17276435f05b27fd067a219854049a6ba521e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious, likely a phishing lure, due to its structure and embedded JavaScript. The document is an image-only lure designed to trick users into clicking a hidden button, which likely leads to an attacker-controlled URL. The presence of embedded JavaScript and numerous external URIs pointing to potentially compromised or disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://euskararenginkana.eus/files/galeria/files/72297602541.pdf In PDF document text
    • http://balade-pierry.fr/userfiles/file/kivewowojokoniwowerilodep.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/gonuzozoletaditisaweku.pdfIn PDF document text
    • https://aashianarealty.com/file/xuletikituvek.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/56760940402.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/vapopesogujib.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/99327880956.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/161365b532cdcf---kusexowajila.pdfIn PDF document text
    • https://zlataraburmevuckovic.com/files/17747295848.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/45288024613.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/20275509272.pdfIn PDF document text
    • https://temahr.hr/files/15352961255.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/zujeromoka.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/43689903083.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/2360848919.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/dopavu.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/jofarakobezekiguvuj.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/vefajesogobenekulerulik.pdfIn PDF document text
    • https://laser123.com/geektic/files/sipufowiwiwez.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/16390719016133cf710f98a.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/temidixewenike.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/bfb4c6bc529a5f1e453398cdb4ddb109/pisagadawumogibejozade.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/33502332742.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/mepazu.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b2eef8eb387762aaeff83ed51da65632/29205649871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=bsc+1st+year+organic+chemistry+notesPDF 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_off0000b0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EC 13728 bytes
SHA-256: c5b27f805e4ce117b5950af6f5221b630c8e863ebd7cfd79af7d81c06869ca67
font_01_sfnt_off0000d288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD288 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 10848 bytes
SHA-256: f27037ead42904c4575ed3b0c51b07c0ced94f1881544c7a71c216ecb50e574c

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