Malicious PDF — malware analysis report

Static analysis result for SHA-256 64392ad4f1ea5aef…

MALICIOUS

PDF

78.1 KB Created: 2021-09-02 09:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 597b06c6b16d2bbab75b8f986bacd3d3 SHA-1: cfd496debea6f498d798539c1fe60b4fb53cd04a SHA-256: 64392ad4f1ea5aefa79e8bf4f8e93ee8496baa26119172319dfd8839721e29c5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. One high-severity heuristic specifically flagged a link to 'artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/33900309222.pdf', indicating a likely attempt to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6505

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://merlegdoktor.hu/tmp/fomulixetakadunikirulevew.pdf In PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c84bc829801---kozunizit.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210607031309.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/gobedazen.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/av5tnde2lmt2ffiurrjvdsd0c0/354187308.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba82be91117---fomuxujakakulolalufo.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/5262d8ed2464f56c57324554ba1c5dbb/76782416170.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072e30f36875---xobamirudemawi.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bad7127f2a2---gidovobikivez.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8a6de7e39---ridaxelosadoxegabu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01a17465a0---75380820269.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/5879776369.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/wokagebidisuzo.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/33900309222.pdfIn PDF document text
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/59809778904.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/dunemut.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/97795554426.pdfIn PDF document text
    • http://flomojapan.com/upload/files/30879997258.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7310ab238f---tifudifemevatevabopop.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-8-20/20210820161159894375.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/68930680301.pdfIn PDF document text
    • http://seja.lv/assets/ckfinder/core/connector/php/uploads/files/22272402905.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210603084905.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/lidoxuxexijadotujamidome.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/95ae8f8fdbff377d2e31766c4f929ebc/73756680905.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=use+of+herewith+in+a+sentencePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DF 10480 bytes
SHA-256: 9664fc17c44a1f767c1ae80321de9f72dd1d87ac0362ad007bdb1746b9ca0ccf

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