Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3024745adba489…

MALICIOUS

PDF

81.4 KB Created: 2021-09-19 21:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0082e3ebb8f7024e078bd1240e9b4501 SHA-1: 97149d81f8202e79714022b4c0b3f418e0f679f6 SHA-256: ec3024745adba4890df654199b631a1fd0fa70addefb1b9c60f6a5ecf66bf7c5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and IP address literals further supports the malicious intent of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://philabc.ru/uplcv?utm_term=gta+san+andreas+real+apk PDF link annotation
    • http://redigonda.it/userfiles/files/93221824687.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/toxukomoneruvujusitome.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/potisibafaf.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/3344474009.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc2de4febd---75194656382.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/99217459437.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/gadavevadanegadixiwofeda.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/sitomorilazixot.pdfIn PDF document text
    • http://garderoba.sk/images/_file/23552197413.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/divedesusatakim.pdfIn PDF document text
    • https://petikdaun.com/contents/files/gewefe.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/nokapewa.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/97127088687.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/67079315004.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/77334453483.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/386e28507911cdb3b061d3f042209be4/buzoda.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/rutisutiwema.pdfPDF link annotation
    • http://mxag.com/upload/browse/file/zawut.pdfIn PDF document text
    • http://polletnv.be/uploads/files/zezogafudijodiwebefifawe.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d157db09c2---wupup.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1613b10b47b4b5---89696731017.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/wejutanepubejigederapux.pdfIn PDF document text
    • http://rsentco.com/upload/file/44017536980.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/55182993452.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0190883001631769577.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_off0000da8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 10304 bytes
SHA-256: 89ad843a92992240783a986b809ea6ad994fe8c5a57e6ceaa48fc9df88ae71d6
font_02_sfnt_off00010a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A01 17560 bytes
SHA-256: e9a296b580f2ba53d9f7325b1a14161b5d3835ad7f6fb4db0f920c0ef3ad7fdd