Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef75f41617d06876…

MALICIOUS

PDF

90.2 KB Created: 2021-05-13 16:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ed56786489979c8d86a13c7c5c1cb03f SHA-1: 8b18ebbd0f9ebd003effbd6461ba002b49e97a0e SHA-256: ef75f41617d06876acde1ac01c48605b35db2dca2aa7a6fe36d8afc9856db155
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal or Intercept Credentials T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing lure, specifically targeting users with a 'Pan card by Aadhaar number only' pretext, which aligns with credential harvesting or MFA abuse. The presence of numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggests an attempt to redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://coretry.ru/uplcv?utm_term=pan+card++by+aadhaar+number+only PDF link annotation
    • http://alexlunacoach.com/img/editor/file/gemowoponapajewoge.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a94d86b37d---gawinilitipinilomober.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/4o388d2lvaucumoplqo0v05ql7/49443383705.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/zelujisipuruteduxuxesu.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/9njpa1f5bgpnvubdcup50sv0k1/juparusewezinerav.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/gusiko.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/fusoloparujosa.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/0dd1b16d475eb85f3dd3e6615391e97b/kunezinutakaz.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16077e6eaa9c98---97981641181.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/06fb54e8c24fcac9df13ee7bfbf7b2ce/63078718457.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/0ac4027903b2669770a4f0ea771195c2/79664419922.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8cf3cc689---12328303836.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/1de4e87612a3d70138329187d47f8cca/55486841883.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4a64390cfc6b6f68f3cef637a08be4a1/tofaxaguzenetemanobazitor.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/jegunadevazidobimo.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/b3atbe5ukc0n9mv9hidd98krbl/godonowobarik.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/46635382572.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/ca217aac851b7c10ee16f4a1f729ea6d/vurexidixosojimokuto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001200e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200E 5244 bytes
SHA-256: 39a3d3d6c2565730f9dc6f22ae856b3779d32e96f2d9882be9600fa8f68e88ab
font_01_sfnt_off000131bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BD 12496 bytes
SHA-256: 8ab2109c3cc777158479337ac2ff8f90c64787856fd5bf0c6250034bb2231302

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