Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae22016dde0047fa…

MALICIOUS

PDF

80.7 KB Created: 2021-09-21 14:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ba3b4e640d39ddc9728318cab25a17a4 SHA-1: 76d873355944d196509a00a9c53a94fe7298cafe SHA-256: ae22016dde0047fa4c432c48f89ca4fdb33c526a982e634d97fc75350fbe6215
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the nature of the PDF suggests it was likely delivered as a Spearphishing Attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=apk+oddworld+stranger%27s+wrath PDF link annotation
    • https://invision.buzyhub.com/files/59498878185.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/piguvutevuviniwafeferulam.pdfIn PDF document text
    • http://szjg.hu/images/file/96727463156.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/46171824734.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/fuwiwe.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/lerizolalitapisitoriv.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109070953341502.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/36825388933.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/wevexaxopubi.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/95650460619.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/xupidawebodejax.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/xelur.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/23578412691.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/8751803166.pdfIn PDF document text
    • http://northcity.rs/slike/files/muzetuwisojasukenenason.pdfIn PDF document text
    • http://erago.cidees.com/uploads/files/37432076798.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/79508019377.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/vomoxovadela.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/vizud.pdfIn PDF document text
    • http://doanandieuduong295doson.vn/namthuan/images/news/files/24265614787.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/79706702650.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/55551039539.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/89270772982.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/fimfbf1tv1nvonkt6svi6aief4/54175212195.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_off0000d717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 10772 bytes
SHA-256: 39287d34598ca52155ee70e532df6e92ad0fec1eb8693f105a52cc46feaa2d2d
font_01_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 17276 bytes
SHA-256: 5ceb44ca6a547b8372de96a7051eee5850a5d8ad61cc47ec25da3f78b8a59d3c
font_02_sfnt_off00011c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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