Malicious PDF — malware analysis report

Static analysis result for SHA-256 222d092bba8d1602…

MALICIOUS

PDF

84.9 KB Created: 2021-09-16 01:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9439b288280d7e797869adf758f09d58 SHA-1: 5e035e02698eb12749cb66f480f5b480b5a0691a SHA-256: 222d092bba8d1602744d3d1da9ee35f1218738cfcd9af117b7b33fe0637ece65
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crewmak.ru/uplcv?utm_term=mech+arena+apk PDF link annotation
    • http://interiorconsignments.com/media/file/47380097520.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/ms64jripakdust6f8lltfhevp2/46191713068.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/87736128874.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/53905277527.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142219e03ed3---jadena.pdfIn PDF document text
    • https://almavilag.hu/files/files/48080872019.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/disunip.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-9-1/20210901163837872675.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/1380813537.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/woxoz.pdfIn PDF document text
    • https://nileagriculturalindustries.com/file/nuwafidupijegolufudimaz.pdfIn PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/52726793771.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/toxesigumojur.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/31618550184.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/pawibovunaj.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/bejapazufokawagevono.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/88581895843.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/ruponawujosulirul.pdfIn PDF document text
    • http://bamila.vn/luutru/files/xukapufiloxobexe.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/wamujuteguzaz.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/jotufixukisomejuv.pdfIn PDF document text
    • http://becskeicsodajo.hu/admin/fck_upload/file/47252089952.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/menasipigarupolamama.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/vorimugolo.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_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 10032 bytes
SHA-256: 3ab0d9da7568599e9ff703bc757d173633d88f798686884baed48dbb753ee52c
font_01_sfnt_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DE 20452 bytes
SHA-256: 685ec2c041284507625ff5740b95fac6516022c5cd9994ba29cabb50608fb1aa