Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ea64807241664a…

MALICIOUS

PDF

81.0 KB Created: 2021-09-16 10:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2a2476ed1b660272b8dbe091f9e2a971 SHA-1: 5d3dfbf38abc0ac6016f874cd350027a749be0d9 SHA-256: 06ea64807241664ab1eeb8889ee1f1e1642f5296e746bc5a798bcd5f2fd6ebb9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, hosting numerous links to other PDF files on disposable or compromised domains, likely to distribute malware or conduct phishing. The presence of a download button lure further supports a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16142ceacc8dd5---71247163295.pdf In PDF document text
    • https://skatrip.com/basefile/skatripcom/files/kosojurodosi.pdfIn PDF document text
    • http://sxsasa.org/images_fck/file/1631764632.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320389b1381---zifixanezunozerilu.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/tulanokavozi.pdfIn PDF document text
    • http://domuran.pl/files/file/lanixemudexakibefuwurera.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/niluvejalefuduv.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/10347192127.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/41583011681.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/59910997236.pdfIn PDF document text
    • https://ivantomanov.com/userfiles/file/memejavewepokaxes.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/17b205d5489bb58361297da7f9f6c79e/fujimogerapemoxubatero.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/44567302024.pdfIn PDF document text
    • http://xtra360.net/campannas/file/butuluwijukozikuvudiba.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/gotafogag.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/2021916045325291.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130f11669279---siluselop.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/nibigiwisokatenomufenewov.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/gagoxe.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/92014267018.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/428882b5f952f24a9901d3ee347af7a0/bajexusadusomugemesige.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/bajipogulikulenagujalox.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/wenugepuvilavazatagan.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/vaxizenirikulesa.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/sulezoponafunifopodag.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/foxexubitopepukumijon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=android+install+apk+app+not+installedPDF 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_off0000d7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C8 10456 bytes
SHA-256: f67018b7b6d0b404071f140a9f7968a6d15d6e447427dee7d89ee8925c99024b
font_01_sfnt_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B8 17816 bytes
SHA-256: 4ee302939f34544928e7cb5d1b660d89d2f0a344bede5eef0cbdd3b8a2a82822

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