Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d334b0f4cee5a3…

MALICIOUS

PDF

82.0 KB Created: 2021-09-11 03:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e56d1851eb642e416649084b74235c4f SHA-1: 6cc877c836ccdf3006d52a00c1145a827e511891 SHA-256: c2d334b0f4cee5a358b29efe3f0b02e1bff9069eb13396a9ee1c76f376e23c63
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. The document also contains numerous links to external sites, some hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://abisspaandboutique.com/nbloom/fckuploads/file/50450619713.pdf In PDF document text
    • https://073741256.com/uploads/files/202109051251474044.pdfIn PDF document text
    • https://scalping.ir/data/files/file/50854620606.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/9a33d66ddaad66548c6c141967d2e6ea/xelemad.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/54851321796.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/12408639668.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/31054300701.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/87590978977.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/xizodefejat.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/83936909920.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/zaxufanojoluxiladerako.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613beeb371e7e---xepavudoxivodoli.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/fufawevunajilubix.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/mowomifim.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/buriwapapen.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/91767844446.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/tizatufokovititaka.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/93922302302.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613992cfcae03---zixarisilidupik.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/75912795070.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/nirineweka.pdfIn PDF document text
    • https://campermagazine.tv/public/file/soturedowapojexomosonef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=windows+8+activator+64+bitPDF link annotation
    • http://irodori.kir.jp/files/file/95584807434.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_off0000d97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 18392 bytes
SHA-256: 8007b1a47c6257003714583cbd71e057513a7affd2ba439c4db3e5b60d6b9873
font_01_sfnt_off0001091a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091A 10924 bytes
SHA-256: 26581911223bdadb5d82fc0bc6f58d02307d0ec56df2ade5a899af4e499e7dd9
font_02_sfnt_off000122a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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