Malicious PDF — malware analysis report

Static analysis result for SHA-256 745e18472cf926b5…

MALICIOUS

PDF

87.3 KB Created: 2021-07-16 02:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: a43f372789f2cdee5e9a48108b7c7be2 SHA-1: 28258edf8c53f3704cf20be9f7b3b2f281f7cb0e SHA-256: 745e18472cf926b58189fe0530f56f0c3089735d738e8b0f597f9b04fb0697fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://alutat.com/data/file/37577164676.pdf In PDF document text
    • http://busankid.com/webfiles/board/file///83808665282.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086058c15f27---zedatodarevuxus.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/59124340071.pdfIn PDF document text
    • http://vieclamketoan365.com/upload/files/92648344368.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/rotajulewelenebomekutajuv.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/87369979566.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/dc552138c0a2dc5aaba246ddadfac380/58962829579.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/faganuzajijakuripofo.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/2632792890.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a45e1d614---84138090306.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/nabatusapebagilazenod.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/07dedfffd23e63bad621055d119f47ef/88781146698.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/kevagivekaxavujudi.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/f0iu236ktjeo1fgi6v2qrnmhsf/juwosisuve.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8a90dedc8---wuvivavodupi.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/jebolu.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/c207d3ce07e6de0c330f5999b40f34c8/23394528392.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735c3df05a5---gadoxopedapaxazur.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/mexezodesebat.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160758e0b0ef16---wiralexotavanominuwe.pdfIn PDF document text
    • http://robedecreateur.com/img/files/kexaboxusavovokavelo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=witch+groups+near+mePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3C 10868 bytes
SHA-256: 315164516a745575d7c3a82b36b0e20048328933c4e16bc883abbf8ff82fbb42
font_02_sfnt_off00012435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 17128 bytes
SHA-256: b03d120b323694be387783b3a0e00debf42daf34fb3cc93e0fae75084104a05b

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