Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd583c39ca207dc…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 10:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d39b80f5ac04394409058ad90b5368d4 SHA-1: 0cbb01b412aa5aff0d20f7884c6a8db3b1f9113a SHA-256: ddd583c39ca207dcc47b7dcf095854c21d9fb702d8a5830ab5f08a75c4c98e7a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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's designed to lead users to malicious sites or download further payloads. The heuristic indicating an instruction to disable security software is a critical finding, reinforcing its role as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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 https://philabc.ru/uplcv?utm_term=metasploit+kali+linux+pdf PDF link annotation
    • https://rubin2000-distribuitorshop.ro/userfiles/file/26479738931.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/81348449542.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0719d4400---vusaki.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/wosukuvaxizener.pdfIn PDF document text
    • http://sun-tes.ru/files/file/vetegubuselorepelimewena.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/65944379236.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/duguvezafipipazuwiregajep.pdfIn PDF document text
    • http://avtosfera28.ru/userfiles/file/kowisajerobojumosojubu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ciiituo2nnroks2jti6igt4gcn/16267663267.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/98890781271.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/sewopujozebesuti.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/74134047040.pdfIn PDF document text
    • http://hbaoge.com/upload/files/febidanufexuxe.pdfIn PDF document text
    • http://bbmpva.nl/fckassets/file/raxogaxome.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/tivixedipubusa.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/56071586463.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/bumozejuv.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2ce9dda0a510a359e5353b1b37350ee0/pifewufusuradife.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/dadajeg.pdfIn PDF document text
    • https://webaprint.be/img/file/66366882339.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/89063190569.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_off0000d755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD755 17564 bytes
SHA-256: 67418045b4049340a46ffe05ef10c252d1a906fb090ec99e7a07fc8ece09e94c
font_01_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 10676 bytes
SHA-256: 8f151da2ae00efc6d7d707457e403f9e1b5114043ff312c3b8142455b614c265
font_02_sfnt_off00011de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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