Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5ee2a95eac0f78…

MALICIOUS

PDF

73.4 KB Created: 2021-09-12 15:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c3ea0717d816c36c67f271a571f2ed36 SHA-1: b0e5e7899f94fed0921573dc2c91c874cd4f6f0b SHA-256: fe5ee2a95eac0f78a6e55e47ab65fe2f327c46196f2510337a88fa38ca2e35e9
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 6

  • 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
  • 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://philabc.ru/uplcv?utm_term=example+of+open+source+os PDF link annotation
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138be35043fe---lakinuwivimumer.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/33841174983.pdfIn PDF document text
    • https://havilahbuilders.com/userfiles/file/85265038797.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/toxitamoreleba.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/69626999204.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/27085466207.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea9bf60b41---supexonexeboguminosij.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/832508777.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/47888923370.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/nawumama.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/jonazasolusokelotomufuta.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0cfm1859elrqhog11abi43peh1/nazavipon.pdfIn PDF document text
    • http://keramann.ru/uploads/files/luxudirekiwopifimixudiga.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/1434862926.pdfIn PDF document text
    • http://w-mill.jp/images/file/68460921102.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/17162256964.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/82434823780.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/40293227911.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/78116119768.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/xesibemanopiwaxurotovotov.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134708c64a3d---54051135526.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/perikaribevojigomataveno.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/jolubapuk.pdfIn PDF document text
    • 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_off0000d262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD262 17484 bytes
SHA-256: f67a78a04836b177805717c3cddf64e2e087dd3cae1ffa47af90b9106f738fbe
font_01_sfnt_off0000ffa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 10636 bytes
SHA-256: f2bdf205e8dc6845f8993e53ff52983339370d768763c244aaa0b600b4963585

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