Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e02e578065399d…

MALICIOUS

PDF

82.3 KB Created: 2021-09-17 18:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b08764815bd38a117136b0e67c87af0f SHA-1: da9338453f55497145cdb6b713a21bc3a59dd6bf SHA-256: a2e02e578065399dd509d2f233931b50e48c304f10ebd76e15309bb5dd2c720b
134 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=the+great+eggscape+pdf PDF link annotation
    • https://alakharia.com/public_html/userfiles/file/81625100462.pdfIn PDF document text
    • https://ajambary.com/userfiles/file/99888376948.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/18659798388.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/97328676151.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/wazogago.pdfIn PDF document text
    • http://ruresept.ru/files/file/36122971636.pdfIn PDF document text
    • http://snsi.jp/image/news_file/peguwakujojefu.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/19597617052.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/4830501675.pdfIn PDF document text
    • http://gasnguyenanhst.com/js/ckfinder/userfiles/files/94011935666.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/biwevejudufizixif.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/92832862539.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/zikudonapasabizipisetewip.pdfIn PDF document text
    • https://pcetravel.com/files/file/4568049875.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/1e6bc0f78c8185ff1164f32b05d1d8c0/nimar.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/sisisuzav.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac5086401d---wovogabaragasozojibugowu.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210902110328.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/mamodalepodokalogoxivewuf.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/59756514086.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/14856579420.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/44705264557.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/53168841920.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210914_08893BBE3F7FDAF7.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/zizunozibirefisezobele.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_off0000d99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99F 18944 bytes
SHA-256: 7e05c561adeb523e963a4315324b8297035e411688d74200a19be6b00caae705
font_01_sfnt_off00010b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B0 10500 bytes
SHA-256: fe3766671602761f4b19e802538708f56305343f8233e407693e4b662ce491c3