Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bb438be833ddf3…

MALICIOUS

PDF

88.9 KB Created: 2021-07-03 02:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b3cadc92d52209050e8dcc6324a96bb3 SHA-1: deb32d6698d0163dbbe8e4c9631fd87c0dc66c8e SHA-256: 46bb438be833ddf33cbe1bbef44aca09091136cceb920959eb3c02ec4d9476c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://absolutelyneon.com/userfiles/file/23088225463.pdf In PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/jl0qn5fodse7li1e5dfivno5fv/40039336269.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/1850c35f311726cff69e14c4dcbac251/94056826295.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/29555995068.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/5e4dd943a2d91ae5781490773b1f5da6/16033567223.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/96591010768.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/vuxeruta.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f088a845e---950131752.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/0fbb483d3b8643121583f87f75ec74aa/nuvosude.pdfIn PDF document text
    • http://axwelindia.com/uploads/73776536827.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dab43c9051---92331995486.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/bac7e5658d512c1cd60d4e8cda3b9108/netojoto.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/xepufesogavov.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/73463922734.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///77745395002.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79974633eb---55217805707.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/ee9e88cade9248d20e2e071a1e44b54f/zofise.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/6v1quve8p2gihqa15tslt2f08p/96401667412.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/bdc937a8dd6c2c9a294c6e27680aa892/51717603150.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ba4156ce73379751cd17d809cc3713c4/jozesaxeto.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f74a33d97e---madulizumebutudapakote.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/ia49cbef02gm2kdq9h2aikbnmo/relowotatovif.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/juvazexovegofineketibe.pdfIn PDF document text
    • http://indel.sk/userfiles/file/62194908895.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/46419615924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=s+rao+testing+and+commissioning+pdfPDF 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_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 17996 bytes
SHA-256: ff87302234d632342880c59239223221fe68ee117c82a565586a72363686b1af
font_01_sfnt_off000124ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE5 10992 bytes
SHA-256: b561a85e6d204375d72eb818928b91ac0d290a603ac7d6eab23a6a214eb8bd03