Malicious PDF — malware analysis report

Static analysis result for SHA-256 191f190119d5e344…

MALICIOUS

PDF

83.2 KB Created: 2021-09-22 09:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 08eb8c59fa649792706cad86bc6cac20 SHA-1: 48b274a7cb45aba0e262c9239050a129ef01b9ef SHA-256: 191f190119d5e344efe0e194ef08498fe38cbd2abf9d3d3f803ed397a0c6ea4d
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised or disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a small PDF acting as a link farm on disposable hosting, suggesting an attempt to direct users to malicious content. The embedded JavaScript, though not fully analyzed due to obfuscation, likely contributes to the malicious functionality, possibly by redirecting users or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/21698509183.pdf In PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/10346555516.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16140a6bf49fe8---zoranutuxobagagutij.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/93996347606.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16134372cd8fc1---38195124639.pdfIn PDF document text
    • http://wixoon.hu/upload/file/36550040544.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/16837043370.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/221f11b9dbdc1340a59ef794f247b0e7/76658348277.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210916174401.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/javupulodabi.pdfIn PDF document text
    • http://firsttimehomebuyerstudy.com/images/file/zobeguka.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109050542201443.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/49736159320.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/xuretakugobozulama.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/4970587174.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/jewitofugaragomedujupudo.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/fonesubuvudawe.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a05c90c95c---50699057355.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/jarifunetebiraxatuw.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/megasirabopaxikibe.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/zidizukodurofezagilukup.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/makidapebujesix.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/nalovosesom.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/17954430032.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/lawepibodebo.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/48263445130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=nanatsu+no+taizai+season+3+watch+onlinePDF 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_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 17120 bytes
SHA-256: 619d9f5e3cf74ceb89d434f529619ef7fcfcb0a681a0d9087ab7870076317fbc
font_01_sfnt_off00010eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB2 10620 bytes
SHA-256: dac59f8662a34b3e9432bf70caca2647766652b07565219551faf67dafab63d6
font_02_sfnt_off00012714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12714 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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