Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5c2a9d96f26988…

MALICIOUS

PDF

78.9 KB Created: 2021-09-12 06:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6de7087de8e282b4528eb5a8033e9aef SHA-1: d31c563dd119549e6c836f7b802798aaebd4d04b SHA-256: 9d5c2a9d96f26988633827dad74edc0ed866ac2577ed8f960a7cb6b1849b19ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised WordPress sites, with one URL specifically mentioning 'download office 365 crack'. This suggests a phishing attempt to trick users into downloading malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe16aaa1e5---3295537634.pdf In PDF document text
    • http://dogomanhnghia.com/uploads/files/20396360319.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/32249984149.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/juzirepolemixuxikajesam.pdfIn PDF document text
    • https://lhorizon.ca/uploadHorizon/file/68635767566.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/9033308743.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/vonir.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613537e04bfae---joxubumebirejexofexazosa.pdfIn PDF document text
    • http://packamate.com/userfiles/40396194624.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff7d3e5a6b---ridusopo.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/56180083218.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/puvum.pdfIn PDF document text
    • https://nasikampung.info/contents/files/goramuvakebavelomuninifa.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e49ea7526---16794903436.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/kanopegife.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210912_ADE9F7AA45DE945C.pdfIn PDF document text
    • http://stefani.cz/fck/file/dafegapefugogimikedi.pdfIn PDF document text
    • http://toflight.mobi/attachment/ckeditor/files/f6e922c914b90aa54d00c75fb214108e.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/42a06b934b3157bbebaabe092cce8dd5/19971305611.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/50401767385.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/zebemoxidonawepexenu.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/10678426538.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/tedaxewopovugiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+office+365+crackPDF 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_off0000ce93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE93 10856 bytes
SHA-256: 322022313030c75503211eba2d906bd873cb65b1568bdc5ed959f4b69a4565e1
font_01_sfnt_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 17940 bytes
SHA-256: a8055fb479dffc7fb37c59c94ae43855312f63fe6f2035ddefc837c1d25482aa
font_02_sfnt_off00011664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11664 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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