Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed98dcee0f4d5e2…

MALICIOUS

PDF

85.8 KB Created: 2021-09-04 07:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ec26e2da804d8129ec61ac78968a374f SHA-1: 6ce85526093d2725b0a3fd327a6429608a6d7eeb SHA-256: 1ed98dcee0f4d5e2a554e6d2868ba354e8b70b3288f3ae423e01653946132b9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs and link farms hosted on compromised CMS uploads and disposable domains, suggesting a phishing or SEO manipulation scheme. The presence of embedded URLs and the nature of the link farms indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=illegal+logging+adalah+pdf PDF link annotation
    • http://www.rify.us/cms-uploads/files/86662232425.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb8dcef14e---woxisejo.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/xenabowepedimatukij.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/zixabedijo.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/1887533769.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/dorazemazugoramodowaji.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f47323e50ad8b6ac1311d4fae445ffb9/fubolotobupeda.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/sotubajexetedovo.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161301bd84499b---94025863089.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/gofut.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3123e652c107cda6b02f22aad5459b71/mepimobasawumen.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d6498f4d3---38075506219.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/rizupogidojapalegasoriki.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802288d0db7---jeparozoroluv.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb96945b86c---38453624649.pdfIn PDF document text
    • https://agatanorek.com/files/file/63540736728.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/20376003061.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/zegejom.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a57dcc4da---rebumobebopi.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/vs8pg0e2d26qtlm5l6kie6be4o/94183401555.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/3962941028.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/c7ecf6b844fae44092d5d1c0018f16ac/pidagirokumobid.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c334440d74b---dilebixelasepogapel.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/qakq56s9mpeu5t09vdutoc7gor/xagubakerumekefufi.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_off0000ee5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5D 17088 bytes
SHA-256: 623ad1d3c03d59bb6bd1844fd6e5b87aff548bbd00e0b4d00d4e8f3aa43e8716
font_01_sfnt_off00011a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4B 10364 bytes
SHA-256: 3c9be8507e089192339aeee14538a5ec7fe6849972605815a15dece0523daffd
font_02_sfnt_off0001314c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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