Malicious PDF — malware analysis report

Static analysis result for SHA-256 555ca93aac45cde5…

MALICIOUS

PDF

57.0 KB Created: 2021-08-11 02:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 183a67fb9f2a29bfd151d84835751654 SHA-1: 8acd13f2ecccc2454cc3e6b06b90184ac3c4a621 SHA-256: 555ca93aac45cde539c80f84603b24d4e1203dace177222926b3aa72859eb136
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many hosted on compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8767

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 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://drafthe.ru/uplcv?utm_term=guide+for+dream+winner+soccer+2020+apk+para+hilesi PDF link annotation
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/9olq3c10f1ctjtkcs3reh8ljk1/belijamaxolirebatunemati.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021052009043170554.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f297d0808---45024746530.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160788de092b07---52148946908.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210809001812.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/57409686874.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/e22f9b67667e8296a03f0544dffa47b5/5163059415.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/26336946714.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/95618472692.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d5a0c411a99aa91c68ba23fb29781acd/sexapenamej.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/59127719501.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/99800053733.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/64876012688.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e80dc4d458b---fedapejuwoba.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/53105338792.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/xozemozobi.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/mazepavopuwilala.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/nigezuvomas.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/881dd3121f697684befd7fc4c2471286/kujanozagazedozedefap.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210718080357.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa566a09489---zazomawafored.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/kqtfmc6v5vab0cehhj57q8qpnf/majibuxuso.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b954e2171---93210452437.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210809_165928.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/parovalurunat.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/tonuwajew.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14C 11348 bytes
SHA-256: b3f2f1b3e78914a109a2087e93766931adaf012df9008c87afb8be6a5849eb7b