Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccd14f60349e60f…

MALICIOUS

PDF

86.7 KB Created: 2021-06-30 22:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7ad3cd1097a25bf0b542e701b8aca4d8 SHA-1: a389be7fc57ef356ac769d2feab8c126b2464cb8 SHA-256: eccd14f60349e60f8d9b8f1e2c0b78f52863b5b053788ebf6c67435645344bc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple suspicious URLs strongly suggests an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://naitikfashions.com/ckfinder/userfiles/files/ziwopiworerupomafofes.pdf In PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/dugesixu.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/6jfnln70a4daq12fhtkr592apd/30754261627.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/zavajiku.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/025293276054333e5428c808bd647a02/lokaxubakanugape.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/jugixezonepuli.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/b30d51b8c73441e0a0f7dc5149cd7d87/28280377546.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/45090285440.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8369a777e6ea3193a39d80bdcb2a614/14491450091.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2242d9fbc---zulaxagedud.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097de7179eff---12596230019.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/2e9f20dfe28264d334b3edbe7eaa7f8a/jisosafexil.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/6363387371.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/8792164366.pdfIn PDF document text
    • http://alconburyreunion.com/clients/36523/File/41069488203.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/kegub.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/9f58e235ceb7e27999120eb697e5f45c/43814934611.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c72fee158a3---widedusukorarinuvotu.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/44bdc08cef48a8766549ac506c4d7d00/xowadubozaxizidudiwabaw.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c64ca97d76b---38680825147.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/pesowidazolozedajib.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fc0d2e803---zanadakefe.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4eb114a4edca94d8b52cf4389acea4a4/29544496660.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=my+dog+has+a+broken+toothPDF 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_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10850 10728 bytes
SHA-256: 94f4097f7998724adeab22679b588469adf4e52749cfeebc97203d6762e2da94
font_02_sfnt_off000120c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C0 16772 bytes
SHA-256: 9832f7227992cc5f4116fb5e0d6310290856515f067146a2388a18180126851b

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