Malicious PDF — malware analysis report

Static analysis result for SHA-256 f382be1f0a0f3c81…

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 20:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f59f52b1c9e18b7ca577751f471f1723 SHA-1: 8686ff763fa963e9160870a149458b5cc40dd4ba SHA-256: f382be1f0a0f3c81cba5b88c093ce85dae63e98da88266abebe2e5f9ec622745
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, indicating it's designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via a link farm. The embedded JavaScript stream is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://smidgel.ru/uplcv?utm_term=star+wars+galaxy+of+heroes+hack+apk+2021 PDF link annotation
    • http://gptools.net/userfiles/file/20915817244.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/87541777014.pdfIn PDF document text
    • http://asfalon.com/__files/file/16868331070.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/linuxa.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/28475923832.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/88408664005.pdfIn PDF document text
    • https://suksesunited.com/contents/files/43435899662.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/90856c0f360c26abfced25f41e2bdfc3/12667996583.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/tadajedos.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/fijufafowiferuk.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/zifazugexofot.pdfIn PDF document text
    • https://arendic.cl/files/datulonunadazibov.pdfIn PDF document text
    • http://erex.hu/upload/file/ruvonufifetiwurovawidun.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/49624859846.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/situmiv.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/68093536444.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/85830644402.pdfIn PDF document text
    • http://househouse.it/userfiles/files/mujomimumebeleseganew.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/e00809fc121cc863c0de370ebba88d42/mojevumemuwer.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/natasutafijizubu.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/gexevajilizijetidof.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/18623440560.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/timadanenunudazemuboxatip.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_off0000c77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77E 11328 bytes
SHA-256: c5b4a97151942a84facdc6d526a87c687a330e0bdf3a90dd2046aa6558dc2a1d
font_01_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 20472 bytes
SHA-256: 6df8c25fe30b65e481264783e09d0765625d291c1dc97d1d16080b79ecd311fe
font_02_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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