Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e659b7bcae51d3…

MALICIOUS

PDF

78.2 KB Created: 2021-09-05 05:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 18a1bffb704610f3069d3702eb623d3b SHA-1: cac481b534b4236259819aff65bd225ae75c1748 SHA-256: 29e659b7bcae51d338f85545c3b127eb1e577bad5b19ca679a025361a8ddaf11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mama-light.net/business_school/uploads/file/wulufoweji.pdf In PDF document text
    • http://cameragiaminh.com/upload/files/76194612654.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/gitigatuvajibijefisu.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/94743531229.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/93169016608.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/85194803304.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/pifebisafivabanomazamufot.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4ab08653b---18693928357.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/nufivijadu.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16128be06c6cc1---bonekolazefome.pdfIn PDF document text
    • http://wonderpanel.com/app/webroot/img/file/44206436439.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/50976087848.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/bijubedajanedadiporasa.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/lifopo.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609459771d9b7---dileloba.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8cd9196708---datikarupukadivedugaz.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/170343397.pdfIn PDF document text
    • https://i3mit.com/shopadmin/upload/files/48136658777.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/werudekonetakekor.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/92699627052.pdfIn PDF document text
    • http://wittzumstegfamilyreunion.com/clients/e/e5/e56c03c63d8c9260b12fda9e5e6a3df6/File/59176551122.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/gc8c39687kr9rk7rjr18mmmisb/rusufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=matrix+information+geometry+pdfPDF 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_off0000ca6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6E 10836 bytes
SHA-256: 1a5092e5f4d1be28e85caed665ff13b1d1ae20d8b26f81ba590a98a358f930c7
font_01_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 18232 bytes
SHA-256: 3cf8eb20e7d1707b729b32fe1b94a5ee4792a5174ffcf7f8232ce080be303d3d
font_02_sfnt_off00011302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11302 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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