Malicious PDF — malware analysis report

Static analysis result for SHA-256 d224254bff8deb1d…

MALICIOUS

PDF

85.5 KB Created: 2021-09-18 12:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 742e69126c7f776f1682b07e91b800d8 SHA-1: ebbbf75a31435794f31454629184d794718daa3d SHA-256: d224254bff8deb1dfc97bea6d86c0e1af66d87b84776614b5978301f0f23b7e0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to external sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a strategy of using numerous links on potentially untrusted hosting.

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://infrive.ru/uplcv?utm_term=gta+san+andreas+xbox+mods PDF link annotation
    • https://motodubai.com/uploaded_images/files/luderudedera.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/83997281285.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/jubepebolivanijir.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/mazufigurozakesowov.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/mavetudekovanakudiwa.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/19771300899.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/mamusoxitojezewutofaxek.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/58980550118.pdfIn PDF document text
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/vawijafoso.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/faropoxazojodotaxat.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16142860a00e08---19574380440.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/winomifogulelojojiw.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/xoronivem.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/jukujisumojig.pdfIn PDF document text
    • http://yoron.net/up/files/sazegutelemifeziven.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/punifuvokedurosazada.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/mipojavi.pdfIn PDF document text
    • http://www.77ice.com/upload/files/mitusonivubujopujoxutuze.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87689083411.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/78554547054.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/1168292566.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/daxedu.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/nuxubanixuja.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/lagipunisezogirokelu.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/rudiparasofenuji.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_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 18096 bytes
SHA-256: e2482a3fdf25a4d8db01b9edd83ef61da8022cc811f1f6a26116be0ffeefac5b
font_02_sfnt_off000130cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CD 10552 bytes
SHA-256: f89826216b28eed61646eef1dc59f7bffefe9ff5f076f0c6e9fbb5cb710f3b94