Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5209117a76969f…

MALICIOUS

PDF

82.4 KB Created: 2021-09-20 09:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 508dae7356b67a97d4a89d0a0a9cd25c SHA-1: b2ee00d9125b5fca2a12b881664f8270fb17ee41 SHA-256: 4a5209117a76969fd025f17a2e7d8cb3aab27eaa872ec07a82869bb21b0e1fab
236 Risk Score

Malware Insights

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

This PDF document exhibits social engineering tactics, specifically a 'ClickFix' lure, instructing the user to copy and paste commands into a terminal. This is a common method to bypass macro restrictions and execute malicious code, likely to download a second-stage payload from one of the numerous embedded URLs. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://pixomot.ru/uplcv?utm_term=android+sdk+location+windows PDF link annotation
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/vibebanunuxobupija.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/ccbb69af37d479110280b4e696f8bbc1/fedorowovonesunotis.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/31131854976.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/bba86f12115dc9561439799cfb0881a9/74907615214.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/97086366311.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/2451243383.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/panewuvoj.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/49449195310.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/xuwotiroraxumevepur.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210919060755.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/sixapatapa.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109091318472960.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/87227925405.pdfIn PDF document text
    • http://furniture83.com/upload/files/80192268652.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613363dc53f50---10437568242.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/fufelewomodov.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/xolibora.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/mowob.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/24946803897.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/52033622575.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a96d3b6455---laparisesamatigowade.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/sutelelajozekakixajobemi.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/82654625620.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f96bebeedd---78056530086.pdfIn PDF document text
    • http://haai.org/upload/file/74149290174.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/7931916162.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_off0000da45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA45 19088 bytes
SHA-256: a14a9f36c8f27354d9bf0502cfa84152490a15f9b3ef34a5a305fcfb9ed43089
font_01_sfnt_off00010c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C26 10388 bytes
SHA-256: d9a79e158765b6ecfcebd24a2ecf9b49a7a0537d9ce245a4ced7b51c5e815129
font_02_sfnt_off000123da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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