Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec4363a9d04d10c…

MALICIOUS

PDF

91.6 KB Created: 2021-09-10 09:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 11aed99f99e2e18f6eeab111073c77d1 SHA-1: 8bc118836a1bca6d31be7278261ebebfba964fbc SHA-256: eec4363a9d04d10c10a90c92952712ae9232354b601451ee77211cd26aade445
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with 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 phishing or malware distribution. The presence of multiple external URIs and link farm heuristics points towards an attempt to lure users to malicious sites.

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://nomortiga.com/contents/files/57039414295.pdf In PDF document text
    • http://abwmarlboropike.com/uploads/files/90445768065.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/unsdqgd60u9bg0a10tqpht6o5m/pugopulidonelatob.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130663f93eda---kojurigaruroba.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/19222568243.pdfIn PDF document text
    • https://olterus.net/contents/files/xepexurade.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/80015726028.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/23150340138.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161313bd14a995---nefixevuzinijirelajovev.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/fogoge.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/gikifepodak.pdfIn PDF document text
    • http://gamaxmotor.cz/data/dokumenty/70708856910.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/85746478785.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/gusunad.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613921f323eb6---gelisetefebuwuraxud.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/janenujejozineg.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/68167900148.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/tewerobarokedi.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/82012172486.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/11574316081.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/sijiwazir.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/7290f67cbc99f635321b565b4237a09f/duzadesuzavozeturutid.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76881078863.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/21978992080.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=spanish+fluency+passages+pdfPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/6852175102.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_off0000fe95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A7 19000 bytes
SHA-256: 3a2ff4f3f01428bd631bdd3ce784f21bd186321ce7bb5f8aa75a667680662f1f
font_02_sfnt_off000147c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C0 10868 bytes
SHA-256: 256a14f69d123df1e9d9d27b003de51807d519af45e95edb046924c4f120355a

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