Malicious PDF — malware analysis report

Static analysis result for SHA-256 819a321e12379455…

MALICIOUS

PDF

76.4 KB Created: 2021-09-10 13:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 28fa3ff7e99c2230e2f812a191a8d8d5 SHA-1: 2a52c2ee4ffd6d436fa73e61e1b97d2fe936d5af SHA-256: 819a321e12379455fa1226b63b7c62fc79546c1152cd901465a4290bdf2795e3
134 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. It contains embedded JavaScript and numerous external URIs, suggesting an attempt to redirect users to potentially malicious websites. The PDF structure and the presence of embedded JavaScript indicate it's likely designed to exploit vulnerabilities or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://archism.ru/uplcv?utm_term=live+cricket+tv+streaming+app+apk PDF link annotation
    • http://midel.me/userfiles/file/86099235633.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/89685673891.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/kuvodusidoz.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/44126227428.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/98159797933.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/vipuvisiseleputeri.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/94441192404.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/56383695920.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/kavekofoj.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/didigijokikotixajaboni.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/d48c8f69f141464ea73d08f299a020b5/waginaduzamedudanemiwo.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/85835351478.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/93908764589.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/10935266507.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/78886719447.pdfIn PDF document text
    • http://xn--hazrdner-r4a10d.com/alisveris/yollanan_resimler/file/12499697713.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/831120423.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109041531201266.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/89028337676.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/75401090401.pdfIn PDF document text
    • http://kaies.net/upfiles/file/42877418077.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_off0000c64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64A 10668 bytes
SHA-256: d155864eb12bb6787758926823a5efd65deb93d33e932b69173a9a4979d2e4f1
font_01_sfnt_off0000dec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC6 17468 bytes
SHA-256: 28e8c07d0471d1d3543eade70d2a394e585f5611fe37490d5afeb0bffbb42045
font_02_sfnt_off00010bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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