Malicious PDF — malware analysis report

Static analysis result for SHA-256 64600fdc131eb2b8…

MALICIOUS

PDF

73.4 KB Created: 2021-09-06 02:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 94273046327e6fc95f9444c11ff1e823 SHA-1: e13fd1ebbd74a2ff9eb34268c79cfb0dc3e29a67 SHA-256: 64600fdc131eb2b8e2288d3bbd962ff8bea17cb0395c16db81417efdf08b9e9a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external links, some pointing to compromised CMS uploads and disposable hosting, suggests it is designed to redirect users to malicious sites or facilitate further compromise. The embedded JavaScript is likely used to execute malicious code or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://eiak.org/upload/editor/files/74956479589.pdf In PDF document text
    • https://egyiksem.hu/uploads/file/pagekaduv.pdfIn PDF document text
    • http://praguetransfer.com/files/file/nevatufelisodorazuxifa.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/rixosefamed.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/xutuvavubokakezexapine.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/rajumavozuromi.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/pabugutipexasutof.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075a81bc0934---31536072212.pdfIn PDF document text
    • http://orthodoxnews.us/file/sozuvolowateziwadapa.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/bcfc925fcb2e2eb7f40eb42f74e03b39/34955362496.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/mevalixipo.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/51245392626.pdfIn PDF document text
    • https://mmszke.hu/files/file/kubotedarebijati.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/58203824204.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160855841c1d2e---64415677529.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/35121092333.pdfIn PDF document text
    • http://meta-min.com/files/80616990531.pdfIn PDF document text
    • http://ledson.ru/upload_picture/nemewodobulis.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608446b67dc51---rizebezuta.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160946f2d7a214---zowapefulinena.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/sofinemavimuwig.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/12245770380.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=us+polo+assn+watch+us9045+manualPDF 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_off0000bb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB43 16440 bytes
SHA-256: d70347d86515d91444fc71df26d147612d7e0feb54661e66997cd76a3be0775e
font_01_sfnt_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 11008 bytes
SHA-256: e7540bcef46c02997cd2e55b6b1f502d77ff75c4fbecab44721932223b3ba846
font_02_sfnt_off0000ffe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.