Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a56535e14fd49aa…

MALICIOUS

PDF

82.5 KB Created: 2021-08-03 03:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 76abe53ecb6cf8d789adc3802f76785d SHA-1: 286566a596eb534fdc90dc5c4b94a6eb59958e3a SHA-256: 0a56535e14fd49aad08bb01f18f3f73524a295d94dff388f2f9952fcb99cad42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to direct users away from the document, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/uplcv?utm_term=o+monge+eo+executivo+pdf+gratis PDF link annotation
    • http://xn--80aikni6a0b.xn--p1ai/images/file/75666968982.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/zogokivevunixitiwezaruku.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/58763605180.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/bozidadurexilugukusi.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4c796a59d---49694652915.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/zusutufofusuge.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/xofanonidasasufanomos.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/lusaduxuxofewibaw.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba007878d---64891856695.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/15375776939.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/02ridqc7jm15fanf79h4fhhma2/57847066087.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/jusijeridumepesemo.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/f1b09f75a88a837cda2870be605a449b/gidirufonelijosixapu.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/xapazodujonovaxavajomis.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/suravutuk.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c05486b0f---bikek.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/19497677813.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/21cd9bca3c2a9dfa0408357fcbd66684/monujiwebudutukufatokavek.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160720fc15543c---36129407548.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/51693000758.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/eac6e5e00d468a429e85dc5156c4c15a/gabaxomexodor.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/mupamek.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8fc4a0cfa---suxofedusiwuzerog.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e7706873b6e---fepafejezazuderuxag.pdfIn 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://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_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 11212 bytes
SHA-256: 4c6836451fe49d45ff7d2f8282b6fc7ed204583fd573079e2aa10f459be830fb
font_02_sfnt_off00010ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 18540 bytes
SHA-256: 4fc2f7cf4ef2d589cf86f11957642d674129cde8e187f301ce7bfd736425e4c4

Open this report in the interactive analyzer, or submit your own file for analysis.