Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fa0083edbcacfb…

MALICIOUS

PDF

76.8 KB Created: 2021-08-09 09:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bfe951548ba6a12fbd2e612e2895897e SHA-1: db945932be5ea29a8b63eb49ae6ac4948077c940 SHA-256: e6fa0083edbcacfbecd9ce16defd53139e753ba612569bbe6335a284bd7d73e7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious content disguised as educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://communeouchamps.fr/userfiles/file/tafokevuwigotudetepute.pdf In PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/60529132146.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160966fbfd446f---75343630507.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/girebupibujufidofusekuter.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/64197497315.pdfIn PDF document text
    • http://learningkey.org/userfiles/96636309253.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e977cc428fe---pisewasekugujapixika.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/49157169744.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b13889bf23---nakakowuxilegikadit.pdfIn PDF document text
    • http://charnafamily.com/clients/60216/File/tigodaneramofubufu.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/4sb80mc5e0vmpni5611sn5lr19/77012730234.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/xujifofaxekujelukemaze.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/wezogiduguxatobenawalez.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a09320e61fc---peruxadowejowalogubipulub.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/05ipr21q1tpob1j8veaemos8v0/teduvijaxo.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/xuxizorudaliwipu.pdfIn PDF document text
    • http://tumonjfk2020reunion.org/clients/f/fe/fe8b949e9fe7e5065ccade199761aacb/File/vunupemizebokupojawivi.pdfIn PDF document text
    • http://jucal.es/images/file/24240545931.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/muxejazake.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a463944af32---pilalulowifexaxudanuxe.pdfIn PDF document text
    • https://go2germany.ru/files/file/bajaxav.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609f89f2e8bdb---witarojevifufowan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=maths+literacy+grade+12+study+guide+pdf+downloadPDF 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_off0000c6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 11364 bytes
SHA-256: 73807b994ef21abcf59badde3eb4ed2b1835adc3e791e6f9ac0ee3932f3ceb00
font_02_sfnt_off0000f995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF995 16640 bytes
SHA-256: 845772649a3325005b0cb314c76f2b09ef4fd06c83a38413a61c80c32a45c5d0