Malicious PDF — malware analysis report

Static analysis result for SHA-256 48676951738ab712…

MALICIOUS

PDF

81.0 KB Created: 2021-09-16 11:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 194bb9f183ffb45e1f0fd1a33a6605c1 SHA-1: b3224ef74d4e26f693e36033644e10d25e3eb610 SHA-256: 48676951738ab7122a1da988e75a4090b1a458bf0c1d15c611b7cc1209dfbaa2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://allytemp.ru/uplcv?utm_term=how+to+hack+free+fire+unlimited+diamonds+apk+download PDF link annotation
    • https://doublehaircenter.com/upload/ckfinder/files/disesuxo.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/vidugufevipomusurilegit.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/66402973037.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/tesig.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/tomiwasarimigapurupatati.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/85646948545.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/3aa08ff715f430ef8664669acd4e1345/lixonuvi.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/mojodoxinujin.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/1351116735.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/50958437998.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1614118d92661a---87895115632.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/78083342617.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/53805598045.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/rabobo.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/zexajuruxebujimutuke.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/83121069960.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/savuz.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/48864491593.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/43979825200.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/59070386310.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/59409006168.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/xozakefek.pdfIn PDF document text
    • https://tele-video.ru/upload/files/28153322763.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_off0000d5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BB 11152 bytes
SHA-256: 7956f42145e2a04c62197a86acf213dd6d21cfcf68940c45931d703540bf74a4
font_01_sfnt_off0000efa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA1 17532 bytes
SHA-256: 69f4bed5584bc08b162648284795f42634542b3b8e1353bdd967d34670e2701f
font_02_sfnt_off00011d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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