Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a63d2365d93fde3…

MALICIOUS

PDF

79.3 KB Created: 2021-09-10 15:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 025aa2f9a417af46176983ac0cafdd16 SHA-1: 0b16e5a431021ed6f1433b92284939e14a5aabc5 SHA-256: 9a63d2365d93fde31a938bffef7199838be1f8ea2a55b32a2e92f9bb1879d107
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content. The presence of embedded JavaScript suggests an attempt to exploit PDF vulnerabilities or deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/vaguforugawukowonuweg.pdf In PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/wuxerepasajerukogegimuvir.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/77691001076.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/jexiwojilugojegipowujen.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/tiboginawawef.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/75924122300.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/34270929068.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/sobevaju.pdfIn PDF document text
    • http://xaydunghoangthanh.com/img_duhoc/files/74069407608.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/42323906462.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/19232660310.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109051153498377.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/ximeresufosabarijeno.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/benoze.pdfIn PDF document text
    • http://soupworld.de/upload/file/tojubeludaditiwijamizom.pdfIn PDF document text
    • http://www.heatandgas.com/EditorImages/file/nivuzowobevev.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/12144430959.pdfPDF link annotation
    • https://sportuna.be/ckfinder/userfiles/files/26153737720.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/nanibi.pdfIn PDF document text
    • http://esangsok.com/upfile/files/4671958716.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4906cd1bf---volenixemek.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/zivojejiziwino.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/wosororiwidazox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ultimate+ninja+storm+4+download+apkPDF 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_off0000c701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 20728 bytes
SHA-256: 8a47e0cb140d0161d0a20b628039520b9a771f1cb2a7dc8819702e7e27fd7aa8
font_01_sfnt_off0000fe02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE02 10944 bytes
SHA-256: 6446713b66eed94987c697132490ff8a119b9099bc05371f3090829c1f81b870
font_02_sfnt_off00011767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11767 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1