Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6a8ada49adbd0b…

MALICIOUS

PDF

83.6 KB Created: 2021-09-12 01:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: af815bb5ae3e5655929abc76ceb35fc4 SHA-1: 230cb669c620e4545701bf2506c50a5c75ff3705 SHA-256: dc6a8ada49adbd0bb994275515c3b4401f6a4513a97d4bdf2a4b1088a965b448
214 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, with a high ML classifier score and specific heuristics indicating a fake CAPTCHA and MFA lure. This suggests the document is designed to deceive the user into providing credentials or performing an action that leads to compromise, likely via a malicious link or by executing embedded scripts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://webbyshoe.com/fckeditor/userfiles/file/ragiwi.pdf In PDF document text
    • http://puntolinea.org/userfiles/files/pulojudefisenajisumaken.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109111435129278.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/nomatavinakavowokokuwol.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/53403098837.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/55827282104.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/32845769916.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/rosoruberunixalobudepuz.pdfIn PDF document text
    • http://cjpharmtech.com/upload/files/63587004130.pdfIn PDF document text
    • https://asi-filter.pl/files/file/laxedinuje.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/pomevadasusodosinajus.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/badapufevepetimofademuwuz.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/89424008380.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/80685808992.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/55990364118.pdfIn PDF document text
    • https://businesslife.com/content/file/34383827751.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109090227154909.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/37698851065.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/88358808994.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/51291997398.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/2p86ekq80g6tke0p4koemp0hev/xaxevifazakogatake.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/31084078411.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/kufitixiretujebasi.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/73199827327.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/55254425365.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/73386472309.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=free+apple+music+code+generatorPDF 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_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 18628 bytes
SHA-256: 608ffd0237de5272d0e99c42317bba0f247c6a7e315612c365e361bd5616d91b
font_01_sfnt_off00010f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F50 10936 bytes
SHA-256: ebdfd711e71aedc2dfe3637aeb95de23b75b4376795cfd1ff61a48eddfedbcb7
font_02_sfnt_off00012861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12861 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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