Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f2acd8797820de…

MALICIOUS

PDF

112.3 KB Created: 2021-07-01 00:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d3e495453d83cdee6e9474edbd1d8a09 SHA-1: 2f284df823796e1b4b6bcfa1027de2a75ad5cfc4 SHA-256: 57f2acd8797820de862499a42853b40a813abb3e5112cb12f244d9e8fce4c28e
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload storage or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://balaji-technology.com/userfiles/file/dudevabazorifaf.pdf In PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/54f3cdcb0498c674ee5a597e5155000d/vagavolamiwini.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/nupon.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080e3fd7df3b---leremiwodezevitafegu.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54d80296c5---tabovutevaga.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d18d12751de---nogejoxaleba.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087c2a1c1757---varuvuk.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/7h2o28dkd1mcnf8foeu7eu6hej/gibatesusumapagoxe.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/tixutujexusofabovefunaz.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/mejile.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/fuzogazisiwifepenubewo.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/pekorulekubugovojizofavi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c5c665ff6---nalaxevujenipizuran.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/8cd44396bd786f40b007c942d023723e/zasorobez.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/418122383.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608db143afb07---64877576373.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/xonagana.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/27cbbab75552a561992a58cc04b25cb1/75744483104.pdfIn PDF document text
    • https://wecareprogram.org/images/file/mobifupom.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef95ed0586---58888006229.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e20dacf859---sisirujezejijexaz.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098579dcac42---8713296965.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbefdbc535---rusovivatapubon.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2466b0d20---38953054201.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160d22b6a9b283---52342027985.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=strengths+of+symbolic+interactionismPDF 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_off000153ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153ED 11112 bytes
SHA-256: 1f20a241a698ed57445f749fa859e6729a06af233ca64d9e3d69f9a65885ae25
font_01_sfnt_off00016da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000185b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185B8 17912 bytes
SHA-256: 251439e92d18688fb7ae9f56bf2772496549a3a0c9ca69de273c5da8e050de81