Malicious PDF — malware analysis report

Static analysis result for SHA-256 27002d7985378aaa…

MALICIOUS

PDF

75.2 KB Created: 2021-10-03 03:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d0d440f4b6ef830ebbd9d0c17a8868d3 SHA-1: 2dca56629f65e5edca0a75153eae8c7c1f62ff52 SHA-256: 27002d7985378aaa5b29330cc783d5aa9ce16de107209f2f8d14b3f5bd26cabf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting sites. The primary purpose appears to be directing users to potentially malicious websites, indicated by the numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=mile+ho+tum+humko+song+download+pagalworld PDF link annotation
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614118af6b3b5---45608178887.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161305cac62729---kakivisitabulada.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/setenowomur.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/29437801530.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210926091638.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/salarubatekigukat.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/aoe3ubste03bj6ttcr9rl6ramo/88852233176.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210926185554.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/xebazugovivadudubiwol.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/sozawusesofudodaz.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/9914460606.pdfIn PDF document text
    • http://greenflameenergy.com/userfiles/file/92033332615.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/848c5dbc1d4f002210450a88b12c46b6/tiselan.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/75287711826.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/29803004223.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/vosekemibij.pdfIn PDF document text
    • http://vhktn.at/images/content/files/96335001664.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/zikixewukax.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/424s4q43rklnnm02g2rp1t5ln5/kunulatipijusatediseku.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/40404454623.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/64390366562.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/lixibofefugu.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/66112962997.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/5742870973.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/65107799734.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_off0000ba97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A9 19336 bytes
SHA-256: 00e6b6b7cc96e571c1d90f2e48aec826b35311464d456d4e3b720aa6b4138f25
font_02_sfnt_off000104fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FB 11112 bytes
SHA-256: 29eee60d08269e825e9ab3b44f534b7425eaa734b23cf2109f3019aa90b71f2e

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