Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97d3ab5915874ef…

MALICIOUS

PDF

86.7 KB Created: 2021-09-17 06:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4c6d26388e9bfe0e3bf37b4cb39c3693 SHA-1: 5faab72c68533dea6ee9774747e407a7c7a4385e SHA-256: d97d3ab5915874efd02d29c8e4ad1cb077d9e0da1e2d0a1be5f5ebcd5cee3121
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a link farm designed to obscure malicious destinations. While no scripts were explicitly extracted, the nature of PDF exploits often involves embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://doitoutdoorz.com/file/RcgLVPFqygpRc6fx.pdf In PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1614131cdb86d7---87036477591.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/luliloxip.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/19432039325.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/pusomebubulanepizis.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/40336299723.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/povugowuba.pdfIn PDF document text
    • https://irrisyst.eu/files/file/sodekonatelabovofutosadi.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/68332058939.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/dipalipirefolopawaduj.pdfIn PDF document text
    • http://hanaelectric.com/userData/board/file/fetumomanoxubonagi.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/38647121595.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/gegekotabujadipixize.pdfIn PDF document text
    • https://fasaac.org/temp/files/tixekunerotoseziboma.pdfIn PDF document text
    • http://nattukoottam.com/userfiles/file/78054477327.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/rapokimufoxalanevudew.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/zobexefubot.pdfIn PDF document text
    • https://airxps.com/userfiles/files/jezabipexezukixagebu.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/85812872986.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/1337299874.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/55862460154.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/radaketutelizonuxu.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613acff686a89---46365579246.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/zezonegasozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=add+call+on+androidPDF 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_off0000ed25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED25 19248 bytes
SHA-256: 8b03492fa81ac2bc7130c28491778b18a0c91cf8df79b9e2c22c67c0c1998a8d
font_01_sfnt_off00011ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DA 9944 bytes
SHA-256: 0bb93593936643e27f34c4bc210350fd380d3ea14a17b1215db21eb3b5f06544

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