Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2591912f8065aa…

MALICIOUS

PDF

98.2 KB Created: 2021-09-19 15:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0330ef9df296c9716b09aee3db480c3b SHA-1: 4a8958addc0eb8d067dc0d598d416dfb73b8cf72 SHA-256: 7d2591912f8065aaa0c986f42bfdef28af77c3fae4dae55178680664fe706654
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple external URLs hosted on potentially compromised websites. These URLs are likely used to deliver phishing content or download further malicious payloads, as indicated by the ClamAV detection and ML classifier flagging it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://drafthe.ru/uplcv?utm_term=watch+blue+story+123movies PDF link annotation
    • http://hataylezzeti.com/resimler/files/11054358545.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/3eea9763f8144047c7c5077d88ffb4e6/nepumumifatirunura.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/dijomipiludawubu.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/24964813380.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/dimepibamixid.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f40c490d28---27985392192.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/megixobajadenazaf.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/30224047722.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/uatanj7rup0fvc517hl52gd5eg/vakexopaxametololod.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/zejifowilekoxuxi.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/romitiw.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/dalegowazosorejugisoxava.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/lamisetipesujo.pdfIn PDF document text
    • https://ysh.my/userfiles/file/mopovineroxunu.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/26375173050.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de390308c7---fimopawamokuge.pdfIn PDF document text
    • http://umhouses.com/uploads/files/lupadi.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///28267487085.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/24568483698.pdfIn PDF document text
    • http://techmechengineers.com/uploads/gujatukuduret.pdfIn PDF document text
    • https://ibextrail.com/editor-images/muxidaxorotetid.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/1876633764.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/sidebumumulavuruzanos.pdfIn PDF document text
    • https://avela.md/userfiles/file/30437980654.pdfIn PDF document text
    • 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_off000114bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCD 20012 bytes
SHA-256: 14eeb185caa135741dcdaa6be45f5cbe5e8d753891235cc98e68c76a3be5e36a
font_02_sfnt_off00016119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16119 11148 bytes
SHA-256: 0ac2455816dd2c5c15ccf0758374a5b4c5cacb347456721634798eb22aba4190

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