Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f04deb222f108ae…

MALICIOUS

PDF

84.9 KB Created: 2021-09-17 17:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7a6fbc3e355587b95fe89834860f108a SHA-1: e9f30ee94ccb60a3cd9ff86b9843f0d682592057 SHA-256: 2f04deb222f108aeaa28d5dd628798bb6d6e4eea8d32371b180860be23d37eef
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to copy and paste content into a command-line interface, a common tactic for executing malicious payloads. Several URLs pointing to compromised WordPress sites and disposable hosting were extracted, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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
  • 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://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c22b46bdf6---bakoloduj.pdf In PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb5fc61b86---jekuzipanuxuweradi.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16140653b1fa64---sarumuvuvusijojis.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/48132005024.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613e30446f7f2---42344166991.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/degekekabifu.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/63348035455.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/gegiwobi.pdfIn PDF document text
    • http://eko-uklid.com/files/file/witawi.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/15143883279.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/13804567692.pdfIn PDF document text
    • https://umutfm.com/resimler/files/96326093061.pdfIn PDF document text
    • http://aprt1day.ru/file/40466068426.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/73267690258.pdfIn PDF document text
    • http://santabruna.cl/upload/file/83085692132.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/23967567611.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/1263591471.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/malenorijixepidiresero.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/30187817203.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/nafaxipalunozurasewotote.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161442bb4e7603---magidejivumigisulofuk.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/zopazirapubus.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/43250898303.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+install+apk+games+on+pcPDF link annotation
    • 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_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 18840 bytes
SHA-256: 275f05a6e96a0e0de7f382bc9bdd2f7225daefb1b84172ec9ba548de3c6402a7
font_01_sfnt_off000115a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC0 10784 bytes
SHA-256: 92a95fa667d053b286bc41e978eb7bf338e669bcb34597ee3fbe2a049bd2e4be

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