Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5e32b2e6ebe407…

MALICIOUS

PDF

80.6 KB Created: 2021-09-03 21:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: edcdc0c28c1f69ff47029f535a8a8b50 SHA-1: fd2cf9c000c33ca74583763b286689d5cf935c0b SHA-256: ff5e32b2e6ebe4075230f7671ac35ec9bc514ff4680cdc652bef09c2da1d145b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Clipboard command execution lure' heuristic suggests the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. Multiple URLs pointing to PDF files hosted on various domains, some associated with compromised CMS uploads, further support the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/ud1ngnaslrd3rhtf2gfqmv9i7v/majiwodokib.pdf In PDF document text
    • http://ahdjcm.com/upload/files/tawejekajenerixo.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/8008832295.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/tanejokusozarugudut.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb99f5b9764---nopubowagokamiturasa.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/8642566762.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/daxijovuwusatutet.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/bodavulajofom.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0546186f7---33185607042.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/11050357533.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb21c9127b9---91108791876.pdfIn PDF document text
    • https://4appsoftware.it/file/19451764574.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/fojulobutawulukodototizu.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c912582dd---folamide.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/bojovuvadajaj.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/pukavoti.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c47d7ead4---dazigenulepovo.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/76831539132.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/99883231737.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/kejaxunu.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210808_061921.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/50061517856.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/s005qavfsgl4ugpe5k5bnuj2jn/nunisosuzaxerenufelutamiw.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/jurilan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=2008+mitsubishi+eclipse+service+manualPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607282948f13f---tudoduxif.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_off0000d22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3C 19108 bytes
SHA-256: 4123835ed047c652251f56f110268f2c3dee2b84593e14bda83f242fac0d3339
font_02_sfnt_off00011aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAC 11180 bytes
SHA-256: dd0ca80ffa1d1900d6e9eb3c96df850aa79c63e4dad3c225c7b8715b85e7003f

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