Malicious PDF — malware analysis report

Static analysis result for SHA-256 0114656beea8c532…

MALICIOUS

PDF

88.2 KB Created: 2021-09-01 05:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 0923c0d96f0f772698a79222792d2282 SHA-1: faa667c49f6b062adc423fff2ad2270648d55a5a SHA-256: 0114656beea8c532af95a9d3d0db1e9ac96093fa63a921b83be68cd43db7c5da
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or initiating further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://medvor.ru/uplcv?utm_term=a+long+walk+to+water+chapter+3+questions+and+answers PDF link annotation
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/27746537919.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/klbhrbjaicrm3dh6gd1sbi8mv9/kosexakazabo.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/606b3e2d76d8dc4bec29306220993fe9/37478820702.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/resolivepanivosenodeba.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/23771546824.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611010f38e9e5---rovujalo.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210505135738191899748.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/jigelemepobuxaxezumer.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/d033d462b19c68ce12b98f9beb2682c9/19833624083.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082533b8e7aa---56254157556.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/wodajo.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/97152377214.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7d7d32981---masazolot.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/48089260299.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/si7r8huph70ebh8nlcdj37m1qd/guxakatozolikejoxugus.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/64350240f9ae2494db26cec70c9a1fe7/dovixujijiwulomevunujaf.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094242166fca---ninala.pdfIn PDF document text
    • http://megalaserasia.com/upload///tasulufu.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/81f3d6fbb49ecc664e64e2f61ad16e54/51556452843.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/65388656876.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842d0b98734---81044475291.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210825_000743_3662.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608227988b9c9---latinutetuse.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/gakadesatevatuwejidazube.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/7gduc7fcnukjoq9brb1eija4o0/94447082106.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/54352601588.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_off0000f116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF116 11372 bytes
SHA-256: 52e85fb2902add71b80b81c61216d3207758a37f4c24fb6e22a1ed0bc35afef3
font_01_sfnt_off00010b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12380 17900 bytes
SHA-256: 0d9fe6ed9edade2becbdb93987ec0c19cbfa7bd214422688eb165a6f002e5e05

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