Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad200bbb0ba378c0…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 07:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 1c276ee36b8728ed1edbf2fef9494cdf SHA-1: 07b667be1e0dc338379927dde887e8de2ab5eafa SHA-256: ad200bbb0ba378c0df13442a32f927009d04e274ddcb5f940e3862b3845da412
156 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 heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://inwebjor.ru/uplcv?utm_term=instagram+ios+2020 PDF link annotation
    • http://marktoby.com/akram/know_news/admin/userfiles/file/13586191620.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/fusutematarimanewirosixud.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/bamejixapolopudobezaveg.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/gb8t5ngjkqcsdmkb4pae0j4l4m/23012038095.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/posulamapokimeseramapel.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/zugewufeme.pdfIn PDF document text
    • http://africareview.in/userfiles/file/zewoxomopavezoxawu.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/fenitatifigivivenodipenub.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/19702593516.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/536ee8a3558062f7494518c050309146/28458731420.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/91000597842.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16138df1c39241---58676566171.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/66989042949.pdfIn PDF document text
    • https://interno-kazan.ru/upload/files/80434981171.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141402a23a7d---vexegotuvegoduzomirovevo.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/wuguvinobowikoda.pdfIn PDF document text
    • http://z500.si/files/loduxejevomewaj.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/35802803727.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614033119b22d---48442266866.pdfIn PDF document text
    • https://2acontractor.it/images/file/potikaximigajivonawinoki.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/saregakijozatituxijo.pdfIn PDF document text
    • http://fullx.net/files/16760404255.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/xubukamokoworof.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_off0000db1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1D 10468 bytes
SHA-256: 03da078af3f9321b01df5c940a9438517ab993cf9df202c903655d262fbe8e0c
font_01_sfnt_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 16716 bytes
SHA-256: bb43fc3722ad2dc73b72d8f3c2f9fb9121e733c01b17725436d269173e9682cc
font_02_sfnt_off00011e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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