Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfee7eaccf8fab24…

MALICIOUS

PDF

74.0 KB Created: 2021-09-11 23:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 4db6ae691593c15d2dd75dd959e2216e SHA-1: 8e69b50f3ef74587e3b4048e02bb546ea13a1571 SHA-256: dfee7eaccf8fab2493acb103585d37e741c8f9668946e3a470c555c1de7891bd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://renfrewareahealthvillage.ca/ckfinder/userfiles/files/betebopuxonosu.pdf In PDF document text
    • https://tallerescarrion.com/uploads/file/rasemofol.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/vorivot.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/2228095796.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210901051148799.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/20566489024.pdfIn PDF document text
    • https://sma-dfgg.org/site/admin/file/41112371460.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/6bd43grlffv9e1s86d7dd1f4l3/76332756093.pdfIn PDF document text
    • https://bnovum.hu/downloads/winuzagelizonure.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/guwawipokibi.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210903_E3986868A82B4981.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/nipujokumebovoxas.pdfIn PDF document text
    • http://actinq.nl/upload/file/japorapapefogatekaxokulo.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/94557578581.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f26388dae0---46208347083.pdfIn PDF document text
    • http://learningkey.org/userfiles/mosomelidotidujafozur.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/19299039956.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210911011635.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/sivulavokawulu.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/12897088060.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/21099241707.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/bebodafepajusarife.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/gizarisikudebukitoxana.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/45556070328.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/tudugat.pdfIn PDF document text
    • http://uteambio.com/upload/files/98079891769.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+record+a+video+playing+on+your+phonePDF 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_off0000bfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE8 10984 bytes
SHA-256: 2fd7a60c48d2df3a6e8714cfda3b20d2a4c0d1f7bea02f32b8aabdfa32f7a394
font_01_sfnt_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 15896 bytes
SHA-256: e8f40747fbb1a884801c64e7a2f85697194d0557022419be7f6707e226100012
font_02_sfnt_off00010201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10201 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1