Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2bc349f961f1372…

MALICIOUS

PDF

97.1 KB Created: 2021-06-10 15:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2fec43d19349f8cade5b0c9aaf997493 SHA-1: 1c0c1c175fcc3ee3414135a355db8e7315a79ce3 SHA-256: f2bc349f961f1372b49bc73f82801ad2adb43ed6788341e5539270ef6ef62880
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=achyutam+keshavam+bhakti+song PDF link annotation
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/pvdp4vecnkjf72ollmtjgnsn3a/8114432948.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a72ea2258dc---nikugube.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/5p1e5ngtjqhsbgqd2dv1v63kj6/wilat.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081eeb387cd6---27938863979.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7d59cb669---79973312169.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/voperopiranazifigutevusub.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607dddcaef53f---zidagivuvew.pdfIn PDF document text
    • https://ovalpolycoats.com/media/72923484844.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/vixedokafa.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00cc3c90b7---47496960339.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/tofowik.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/60647231076.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/bf506a94a5c2b2af8ed4e0c7de6803ea/38689049577.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/89ce9f3868c656c2ac8526497b1e238f/81320111528.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_off00013f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F50 5440 bytes
SHA-256: 3e56201a973514119d550c01a6b292882b26bd46a97e6b4279474827c1317fba
font_01_sfnt_off000151c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151C6 11076 bytes
SHA-256: ba9a3247096af1d315dabfaa9c3eeaebff0719e3f448cfb96209b545afa6585c

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