Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fce4c2209c4da63…

MALICIOUS

PDF

69.9 KB Created: 2021-09-18 21:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cf7e80e9542a08434c023666f670b9cc SHA-1: 7a42430906985f87783073ad2e32d9178af62702 SHA-256: 5fce4c2209c4da63a12b6bafa519ea354223ecf26f2c6187a188b13b8bd4d1f3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to act as a deceptive gateway to other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://inwebjor.ru/uplcv?utm_term=sabse+accha+photo+editor+app PDF link annotation
    • http://speaklifeiamgreatness.com/files/files/neberono.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/99730189720.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/79914103111.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/vowubiwunulutet.pdfIn PDF document text
    • http://shinaval.ru/userfiles/file/51826491735.pdfIn PDF document text
    • https://bloc-immo.com/images/wiput.pdfIn PDF document text
    • http://josquin-capella.de/download/mazituvome.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/noruzis.pdfIn PDF document text
    • http://tayles.com/uploaded/61084009321.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/94073432606.pdfIn PDF document text
    • https://tcremich.lu/files/files/38315400544.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/sudogikinoliw.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/41878981561.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/kawozigis.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/17060607634.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135b6b46db96---wizisatixiboz.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/34714595060.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202193121424444.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3895643110.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0aa04193b---95956132463.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/jibisowonipapamezikan.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/15387216569.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/bojirobe.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E5 10676 bytes
SHA-256: 54d34fb5e434b8f38d03f8f4852bdf7ec700a98ce5f28264297f6a7871494aa3
font_02_sfnt_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 16704 bytes
SHA-256: 822b9f5dfad0a7ddc5aea493b200fb63479d57e095169d8efd41043bc2081240

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