Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a936e0a0eb05ef…

MALICIOUS

PDF

73.7 KB Created: 2021-09-27 05:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f9ea0a8e5d3275df6b44d5cb5fc22f1 SHA-1: 7f3d2186a54666be5820cd06d7d2ac51303b416f SHA-256: 47a936e0a0eb05efd53b217e2a1db5ac87484276874e36bb4d6fbce737b5535c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/uplcv?utm_term=how+to+retrieve+deleted+photos+from+mi+phone PDF link annotation
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148a6b0113d4---86485523083.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/67981526608.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/69802263567.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/62850804361.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/14987409672.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/65687340647.pdfIn PDF document text
    • http://imi.vc/upload/files/dewopegixugagijuxafumes.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/4496872328.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fenitowi.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/44955939826.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/13483652517.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/xizepirewoliva.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/41858987242.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/juzepuboru.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/mewinurorelede.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/divekakojitusofufi.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/jivol.pdfIn PDF document text
    • http://esistore.be/userfiles/file/91897102517.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/xutevilujexufosozeme.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/1669968601.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/71557687616.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_off0000b94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94C 18544 bytes
SHA-256: 4df6e1e58c2df7693fff0fc209f77fe8c90a6116aa675188b1feeee11fa30960
font_01_sfnt_off0000e8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 10744 bytes
SHA-256: 4157083e6d2d1c4c18569a4f076496eb872891bf50f20b7b546ec05218698092
font_02_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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