Malicious PDF — malware analysis report

Static analysis result for SHA-256 62eb76b3fc1d4e18…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 03:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d9651f007e6f3752e445eafd0c58fc4d SHA-1: 7c0c18d406f04980303a88f1be82526cb4ea5a23 SHA-256: 62eb76b3fc1d4e1888d9e5ddc61c3f577c2c175f0174982db711cbf18e7b368d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used for malicious redirection. ClamAV also detected this file as a 'Pdf.Phishing.Trojan'. The presence of embedded URLs suggests an attempt to direct users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://artistprasanna.com/userfiles/file/finukoberoruk.pdf In PDF document text
    • http://ecohost.ru/pics/images/file/midezadi.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/kabusowifivakepeda.pdfIn PDF document text
    • http://attlas.center/userfiles/file/76506392286.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/sobubesuzej.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/64088016533.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/11637931052.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442f48896b7---semufowupivel.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14575850468.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/71776290935.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/lefovilewevesazaragara.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/88659766508.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/kofogufu.pdfIn PDF document text
    • http://findacommodity.com/upload/file/29929835821.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/23220742026.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-04/210904095026231539v3v7e8b8e54t.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/pavagisaf.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/wizazup.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109222134053707.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/17781073404.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/xonavafuluwovikitufajo.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/47401117597.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=adblock+extension+in+chromePDF 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_off0000af98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF98 10788 bytes
SHA-256: 3cfd217e0255fd1272c56a881b2320c3280b93da61fce5a31d5a04065fa783b4
font_01_sfnt_off0000c843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC843 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 14752 bytes
SHA-256: 115de2c39b02cff8add2114252e8d56ca73a7750601445d6a77a2acd666366e1

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