Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9696b2130e0b5f4…

MALICIOUS

PDF

87.6 KB Created: 2021-09-16 06:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8fb042ad8abd687530a0ec90b0a36215 SHA-1: 19e0b4918822b8e729343c8dfddafcfb47e9b150 SHA-256: d9696b2130e0b5f44272f06b132f360665f8993a06d382d84838dec62559b0e3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for exploiting PDF vulnerabilities or redirecting users. Multiple heuristics indicate the PDF is part of a link farm, with many URLs pointing to compromised websites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • 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://garglob.ru/uplcv?utm_term=android+no+ringtone+for+incoming+call PDF link annotation
    • http://gallery4walls.com/upload/editer/file/kolojirifawemunidirelup.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/saviwigutikozoxojuwem.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/nivon.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/xakagixib.pdfIn PDF document text
    • http://htwy.com/upload/file/tisepirobuwadinijifawera.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ta6739fa5g4g0lobl827bgfu2u/rirowedotizuxariludalexa.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/9adf751992736ca057d3d28bf0036a75/wexozetepan.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/57725041302.pdfIn PDF document text
    • https://investkwik.com/userfiles/file/bonuw.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/nipemaku.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/15941581990.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/sixatojuko.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/91951256775.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3osnm17u05urjpgpicv3o1dkt5/pabimanalexajapexixesifag.pdfIn PDF document text
    • http://tzsunup.com/upload/pakov.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5511be5e0---35470929494.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613887b90fbbd---bikolozelojowav.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/dikoderixasowupe.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/81368546289.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/22294180118.pdfIn PDF document text
    • http://klpa.net/userData/board/file/80061948031.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/19924528341.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/85477556876.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/51856223800.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/jogabinomarenefinalu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 18508 bytes
SHA-256: 3b1f330b3d54a77b897756f8fae0bf3688268c045bd11448398ac2ae4ddb963c
font_01_sfnt_off0001207d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207D 10632 bytes
SHA-256: 387d47d6a8cdb69da06e4b51a40181b6eb04e9291498adb843cd97beeb916b76
font_02_sfnt_off00013899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13899 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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