Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7a1cb2d5963e09…

MALICIOUS

PDF

84.9 KB Created: 2021-08-15 10:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9943253f43292f7d8d6ba17c2d53ffd2 SHA-1: 6d34f1c66f538cba1bd426af84cf6f3dbea10e3d SHA-256: fd7a1cb2d5963e091a88a86e06a1591a2cc11fce1d81943d98fd8e62f362dcbf
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, some pointing to compromised CMS uploads, suggesting an attempt to deliver a malicious payload or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mimpiindah2.com/contents//files/topetakikefafojivepoja.pdf In PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/satowus.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/20332c04e80cc77b01e83f478664a56e/28524290397.pdfIn PDF document text
    • http://mousike.it/img_ins/files/85654156321.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6f925394b---64308231605.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/56c9ff52a766fcfcfbd464409d13f913/dirovekejowukej.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/vfp7nkefaa4fi5qs3ubm3dijhv/puwuves.pdfIn PDF document text
    • http://nfc.soo.jp/file/fasijazidamikugidaxife.pdfIn PDF document text
    • http://hidramaco.com/files/files/zikolokuxixorafunijetag.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/12944317619.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/dogexajikinogozoradef.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5c0068f5---43025002234.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749305563e9---94889539162.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/wasul.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/dozigebufumeravewozami.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d692d9cd0ad---75559324690.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/57077727974.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/88428938758.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/ralurulo.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b7039f81b---53269667815.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/bajinipimidaxowefi.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/bomimotalonapefivagumigat.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/51536507634.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=clash+of+clans+unlimited+gems+hack+2020PDF 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_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 17252 bytes
SHA-256: 7d42aa1fbae7666bdb58eeddea4bb830575705a57723973a9ad29abd75ab76f9
font_01_sfnt_off00011138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001294f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294F 11288 bytes
SHA-256: 7a50beb54a3475a7471fc48a946455ccc23190acf1c2b38e954a01372adb0804