Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7e25a065dad113…

MALICIOUS

PDF

95.7 KB Created: 2021-09-07 19:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 642a40c2f6fabd32c6dd96255f9d2beb SHA-1: a9ed14a2ed301e080294b9be05c1b90bbc87b1a3 SHA-256: 4b7e25a065dad11377f9ddbc23e87faf02dd90538de06268013ef3e38522f207
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links pointing to compromised websites, indicating an attempt to deliver a malicious payload. The presence of a 'download button' heuristic further supports a phishing or malware delivery attempt. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://santiagoporter.com/js/ckfinder/core/connector/php/files/gaginebuw.pdf In PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/29dc5fc74fe457d3926680ffe2c7bc13/kimojuwifupaxinodab.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607f96f9ee366---wawupinerigom.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/91040066927.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dc5ada94f---terufipowewodukuz.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/mobuxopero.pdfIn PDF document text
    • http://yongqingtech.com/d/files/42951793159.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d892f63ba2---nibodadamolidibo.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210821015509_alreos.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088179203e2b---7975729363.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bbf69a2dc6---94227946256.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/fugolap.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f0e15c039---kasirop.pdfIn PDF document text
    • https://ecosolar-energy.com/piceditor/file/dedipunefaviwinov.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/xutapesafagadugolikovin.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/rodiwiriwejulasoj.pdfIn PDF document text
    • http://liily.jp/upload/file/20210822102242.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/2fbe66dc009180a15c80eb3e15bbdc86/ligidovajawifi.pdfIn PDF document text
    • https://studiorampinelli.com/file/lobogodumoduworut.pdfIn PDF document text
    • https://atlantidegattico.it/file/48343554961.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/86783165973.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=ctet+previous+year+solved+question+paper+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2292e889db---fepewutagexenajirewowobi.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_off00010b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12380 10948 bytes
SHA-256: ffa3224fa4e83e5126d3dfb5e3e6b3bfbc9e3c6477c0271c2f7cb63453055b9a
font_02_sfnt_off00013ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCF 19980 bytes
SHA-256: 6d8edc40fd33b45929135a9a7b3e6bb1569169327db27186109015ffe76c6e2e

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