Malicious PDF — malware analysis report

Static analysis result for SHA-256 530e4c7f1a169a51…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 01:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0fd4fc4990838aa16d8a5cbc98775e18 SHA-1: 14b5e3d0a129136f2e0928742d992930e032ff3d SHA-256: 530e4c7f1a169a516e5c2f21f7bd04c73c5531eaa4bb2e15f3d497b86da45e83
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://krisoc.ru/uplcv?utm_term=iran+sanction+list+2018+pdf PDF link annotation
    • http://kgmda.com/upload/files/81141933733.pdfIn PDF document text
    • http://orhs76reunion.com/clients/30721/File/8939710062.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/7h2im00vo0fapn4ngiubetlus2/69090350618.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/redibe.pdfIn PDF document text
    • http://mcutech.net/files/1227388411.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/55622189315.pdfPDF link annotation
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f2636e1ce---54783053649.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/jupebaxodamanavoben.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/29809433544.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/60172178315.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/guvawuguvokuxonomug.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/69978893615.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//nufofanabe.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/sufox.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/96603018692.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/35402270521.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/20523830708.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/52396080273.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/sumexomuxiz.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/453e9db204ed1c400fb0a7fb6953278e/nujadonagivenejo.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/pexasaf.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8a823cf5f---86092612830.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/68200420515.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/e9469b00bc42d91634fb16957d762067/38354385010.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_off0000d2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A2 10932 bytes
SHA-256: 202d8949543aab303e01243c75dfd939b20bbee7e07da7c0221f58381b5df42b
font_01_sfnt_off0000ec28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 17280 bytes
SHA-256: ae05b407971df9cac691c7b212a78b46901b171d5834d2b4d4b1b75883ef108a