Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9d59db9e13ef56…

MALICIOUS

PDF

89.9 KB Created: 2021-09-18 11:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aee902dbdc56bed06f50bd9a400ffaeb SHA-1: 923631d9621bf6dab91d27bf34a77f93b33f2754 SHA-256: 3d9d59db9e13ef5675c61231b714773d913a2825086764c1b78e582d78f7876c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=dude+theft+wars+online+play+free PDF link annotation
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/vebetixanu.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/kasipezefib.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/zowowe.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/wutabim.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/24823964323.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/931846160.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16131169188b2b---gibezakawegus.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/pejaxe.pdfIn PDF document text
    • http://kiajihlava.cz/UserFiles/File/kinojor.pdfIn PDF document text
    • https://megashina24.ru/files/files/xavesimuzusukusibeno.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613db4b6ab054---zegesipewav.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/vejovadetetun.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/kutidugojiwevefe.pdfIn PDF document text
    • http://dentherapia.hu/files/file/21000471710.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/zevonugeditoxu.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161362957361a6---jejufowugopowiviz.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/031806331736.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/96767496815.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210912085348.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210908195507.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/wosorufanikogatumuvirudi.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/zulejanikufogilusuk.pdfIn PDF document text
    • http://jump360.co/upload/files/20210915184605.pdfIn PDF document text
    • https://pre-www.bridge-academy.com/uploaded/ckeditor/files/46594180790.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_off0000f66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66B 19828 bytes
SHA-256: 4c09235ba10d79d4e6bed3160640f2253d78b1835500fcda8e241c625c477d4a
font_01_sfnt_off00012882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12882 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14099 10896 bytes
SHA-256: 3a5d1a86c9ee5c4a5470066d416f275c4d4191845634b4b442d5f289433ffc50

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